26311893640 has 16 divisors (see below), whose sum is σ = 59201760780. Its totient is φ = 10524757440.

The previous prime is 26311893637. The next prime is 26311893679. The reversal of 26311893640 is 4639811362.

It can be written as a sum of positive squares in 2 ways, for example, as 26207076996 + 104816644 = 161886^2 + 10238^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328898631 + ... + 328898710.

Almost surely, 2^26311893640 is an apocalyptic number.

26311893640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26311893640 is an abundant number, since it is smaller than the sum of its proper divisors (32889867140).

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

26311893640 is a wasteful number, since it uses less digits than its factorization.

26311893640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657797352 (or 657797348 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 26311893640 in words is "twenty-six billion, three hundred eleven million, eight hundred ninety-three thousand, six hundred forty".