15213204864 has 640 divisors, whose sum is σ = 55070991360. Its totient is φ = 4105728000.

The previous prime is 15213204821. The next prime is 15213204871. The reversal of 15213204864 is 46840231251.

It is a happy number.

15213204864 is a `hidden beast` number, since 1 + 521 + 32 + 0 + 48 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 45961179 + ... + 45961509.

It is an arithmetic number, because the mean of its divisors is an integer number (86048424).

Almost surely, 2^15213204864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15213204864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27535495680).

15213204864 is an abundant number, since it is smaller than the sum of its proper divisors (39857786496).

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

15213204864 is a wasteful number, since it uses less digits than its factorization.

15213204864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 15213204864 in words is "fifteen billion, two hundred thirteen million, two hundred four thousand, eight hundred sixty-four".