13121520164 has 24 divisors (see below), whose sum is σ = 23708030976. Its totient is φ = 6347880000.

The previous prime is 13121520161. The next prime is 13121520169. The reversal of 13121520164 is 46102512131.

It is not an unprimeable number, because it can be changed into a prime (13121520161) 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, 1130189 + ... + 1141739.

It is an arithmetic number, because the mean of its divisors is an integer number (987834624).

Almost surely, 2^13121520164 is an apocalyptic number.

It is an amenable number.

13121520164 is a deficient number, since it is larger than the sum of its proper divisors (10586510812).

13121520164 is a wasteful number, since it uses less digits than its factorization.

13121520164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20747 (or 20745 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The spelling of 13121520164 in words is "thirteen billion, one hundred twenty-one million, five hundred twenty thousand, one hundred sixty-four".