1268806365 has 12 divisors (see below), whose sum is σ = 2199264444. Its totient is φ = 676696704.

The previous prime is 1268806361. The next prime is 1268806397. The reversal of 1268806365 is 5636088621.

1268806365 is a `hidden beast` number, since 1 + 2 + 6 + 8 + 8 + 0 + 636 + 5 = 666.

1268806365 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 510850404 + 757955961 = 22602^2 + 27531^2 .

It is not a de Polignac number, because 1268806365 - 2² = 1268806361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 28195697 = 1268806365 / (1 + 2 + 6 + 8 + 8 + 0 + 6 + 3 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1268806365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268806361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14097804 + ... + 14097893.

It is an arithmetic number, because the mean of its divisors is an integer number (183272037).

Almost surely, 2^1268806365 is an apocalyptic number.

1268806365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1268806365 is a deficient number, since it is larger than the sum of its proper divisors (930458079).

1268806365 is a wasteful number, since it uses less digits than its factorization.

1268806365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28195708 (or 28195705 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 1268806365 is about 35620.3083226409. The cubic root of 1268806365 is about 1082.5927546497.

The spelling of 1268806365 in words is "one billion, two hundred sixty-eight million, eight hundred six thousand, three hundred sixty-five".