26671811568 has 20 divisors (see below), whose sum is σ = 68902180008. Its totient is φ = 8890603840.

The previous prime is 26671811557. The next prime is 26671811587. The reversal of 26671811568 is 86511817662.

It is a super-2 number, since 2×26671811568² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26671811568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277831323 + ... + 277831418.

Almost surely, 2^26671811568 is an apocalyptic number.

It is an amenable number.

26671811568 is an abundant number, since it is smaller than the sum of its proper divisors (42230368440).

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

26671811568 is a wasteful number, since it uses less digits than its factorization.

26671811568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555662752 (or 555662746 counting only the distinct ones).

The product of its digits is 967680, while the sum is 51.

The spelling of 26671811568 in words is "twenty-six billion, six hundred seventy-one million, eight hundred eleven thousand, five hundred sixty-eight".