268774761520 has 40 divisors (see below), whose sum is σ = 657790867440. Its totient is φ = 101851488000.

The previous prime is 268774761511. The next prime is 268774761551. The reversal of 268774761520 is 25167477862.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 88411231 + ... + 88414270.

It is an arithmetic number, because the mean of its divisors is an integer number (16444771686).

Almost surely, 2^268774761520 is an apocalyptic number.

268774761520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

268774761520 is an abundant number, since it is smaller than the sum of its proper divisors (389016105920).

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

268774761520 is a wasteful number, since it uses less digits than its factorization.

268774761520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176825533 (or 176825527 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 55.

The spelling of 268774761520 in words is "two hundred sixty-eight billion, seven hundred seventy-four million, seven hundred sixty-one thousand, five hundred twenty".