268837991664 has 60 divisors (see below), whose sum is σ = 763374010728. Its totient is φ = 81466056320.

The previous prime is 268837991657. The next prime is 268837991683. The reversal of 268837991664 is 466199738862.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23137959 + ... + 23149574.

Almost surely, 2^268837991664 is an apocalyptic number.

268837991664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

268837991664 is an abundant number, since it is smaller than the sum of its proper divisors (494536019064).

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

268837991664 is a wasteful number, since it uses less digits than its factorization.

268837991664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46287566 (or 46287549 counting only the distinct ones).

The product of its digits is 188116992, while the sum is 69.

The spelling of 268837991664 in words is "two hundred sixty-eight billion, eight hundred thirty-seven million, nine hundred ninety-one thousand, six hundred sixty-four".