26681766188 has 48 divisors (see below), whose sum is σ = 58227289344. Its totient is φ = 10393256640.

The previous prime is 26681766179. The next prime is 26681766197. The reversal of 26681766188 is 88166718662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26681766179) and next prime (26681766197).

It is a super-2 number, since 2×26681766188² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2716895 + ... + 2726697.

It is an arithmetic number, because the mean of its divisors is an integer number (1213068528).

Almost surely, 2^26681766188 is an apocalyptic number.

26681766188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

26681766188 is an abundant number, since it is smaller than the sum of its proper divisors (31545523156).

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

26681766188 is a wasteful number, since it uses less digits than its factorization.

26681766188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18662 (or 18660 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 59.

The spelling of 26681766188 in words is "twenty-six billion, six hundred eighty-one million, seven hundred sixty-six thousand, one hundred eighty-eight".