1264683375720 has 48 divisors (see below), whose sum is σ = 4110220972260. Its totient is φ = 337248900096.

The previous prime is 1264683375719. The next prime is 1264683375743. The reversal of 1264683375720 is 275733864621.

It is a happy number.

1264683375720 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 68 + 3 + 3 + 7 + 572 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1166698099044 + 97985276676 = 1080138^2 + 313026^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1756504329 + ... + 1756505048.

Almost surely, 2^{1264683375720} is an apocalyptic number.

1264683375720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264683375720 is an abundant number, since it is smaller than the sum of its proper divisors (2845537596540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1264683375720 is a wasteful number, since it uses less digits than its factorization.

1264683375720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513009394 (or 3513009387 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 1264683375720 in words is "one trillion, two hundred sixty-four billion, six hundred eighty-three million, three hundred seventy-five thousand, seven hundred twenty".