26931930880 has 72 divisors (see below), whose sum is σ = 65394321552. Its totient is φ = 10625163264.

The previous prime is 26931930847. The next prime is 26931930889. The reversal of 26931930880 is 8803913962.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26931930889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50674 + ... + 237553.

It is an arithmetic number, because the mean of its divisors is an integer number (908254466).

Almost surely, 2^26931930880 is an apocalyptic number.

26931930880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26931930880 is an abundant number, since it is smaller than the sum of its proper divisors (38462390672).

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

26931930880 is an equidigital number, since it uses as much as digits as its factorization.

26931930880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288321 (or 288307 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 26931930880 in words is "twenty-six billion, nine hundred thirty-one million, nine hundred thirty thousand, eight hundred eighty".