268436935881 has 27 divisors (see below), whose sum is σ = 411932825031. Its totient is φ = 168414439104.

The previous prime is 268436935853. The next prime is 268436935901. The reversal of 268436935881 is 188539634862.

It is a happy number.

The square root of 268436935881 is 518109.

It is a perfect power (a square), and thus also a powerful number.

268436935881 is a `hidden beast` number, since 2 + 6 + 8 + 43 + 6 + 9 + 3 + 588 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 208990694025 + 59446241856 = 457155^2 + 243816^2 .

It is not a de Polignac number, because 268436935881 - 2¹⁵ = 268436903113 is a prime.

It is a super-2 number, since 2×268436935881² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (268436935381) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 26418480 + ... + 26428638.

Almost surely, 2^268436935881 is an apocalyptic number.

268436935881 is the 518109-th square number.

268436935881 is the 259055-th centered octagonal number.

It is an amenable number.

268436935881 is a deficient number, since it is larger than the sum of its proper divisors (143495889150).

268436935881 is an frugal number, since it uses more digits than its factorization.

268436935881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20358 (or 10179 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 63.

The spelling of 268436935881 in words is "two hundred sixty-eight billion, four hundred thirty-six million, nine hundred thirty-five thousand, eight hundred eighty-one".