13261326564 has 24 divisors (see below), whose sum is σ = 32571679840. Its totient is φ = 4187787264.

The previous prime is 13261326523. The next prime is 13261326571. The reversal of 13261326564 is 46562316231.

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, 29081629 + ... + 29082084.

Almost surely, 2^13261326564 is an apocalyptic number.

It is an amenable number.

13261326564 is an abundant number, since it is smaller than the sum of its proper divisors (19310353276).

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

13261326564 is a wasteful number, since it uses less digits than its factorization.

13261326564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58163739 (or 58163737 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

The spelling of 13261326564 in words is "thirteen billion, two hundred sixty-one million, three hundred twenty-six thousand, five hundred sixty-four".