15213523864 has 64 divisors (see below), whose sum is σ = 36065088000. Its totient is φ = 5843846400.

The previous prime is 15213523861. The next prime is 15213523879. The reversal of 15213523864 is 46832531251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15213523861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130189 + ... + 217660.

It is an arithmetic number, because the mean of its divisors is an integer number (563517000).

Almost surely, 2^15213523864 is an apocalyptic number.

15213523864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

15213523864 is an abundant number, since it is smaller than the sum of its proper divisors (20851564136).

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

15213523864 is a wasteful number, since it uses less digits than its factorization.

15213523864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347944 (or 347940 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The spelling of 15213523864 in words is "fifteen billion, two hundred thirteen million, five hundred twenty-three thousand, eight hundred sixty-four".