26640899512 has 32 divisors (see below), whose sum is σ = 52906212720. Its totient is φ = 12533056000.

The previous prime is 26640899501. The next prime is 26640899521. The reversal of 26640899512 is 21599804662.

It is a self number, because there is not a number n which added to its sum of digits gives 26640899512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443262 + ... + 499762.

Almost surely, 2^26640899512 is an apocalyptic number.

It is an amenable number.

26640899512 is a deficient number, since it is larger than the sum of its proper divisors (26265313208).

26640899512 is a wasteful number, since it uses less digits than its factorization.

26640899512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59991 (or 59987 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 26640899512 in words is "twenty-six billion, six hundred forty million, eight hundred ninety-nine thousand, five hundred twelve".