268306687765 has 8 divisors (see below), whose sum is σ = 325585644120. Its totient is φ = 212233604352.

The previous prime is 268306687717. The next prime is 268306687777. The reversal of 268306687765 is 567786603862.

It can be written as a sum of positive squares in 4 ways, for example, as 57733997841 + 210572689924 = 240279^2 + 458882^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268306687765 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 268306687697 and 268306687706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301467744 + ... + 301468633.

It is an arithmetic number, because the mean of its divisors is an integer number (40698205515).

Almost surely, 2^268306687765 is an apocalyptic number.

It is an amenable number.

268306687765 is a deficient number, since it is larger than the sum of its proper divisors (57278956355).

268306687765 is an equidigital number, since it uses as much as digits as its factorization.

268306687765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602936471.

The product of its (nonzero) digits is 121927680, while the sum is 64.

The spelling of 268306687765 in words is "two hundred sixty-eight billion, three hundred six million, six hundred eighty-seven thousand, seven hundred sixty-five".