15396894656 has 224 divisors, whose sum is σ = 37798004160. Its totient is φ = 6126796800.

The previous prime is 15396894647. The next prime is 15396894677. The reversal of 15396894656 is 65649869351.

It is a super-2 number, since 2×15396894656² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13883030 + ... + 13884138.

It is an arithmetic number, because the mean of its divisors is an integer number (168741090).

Almost surely, 2^15396894656 is an apocalyptic number.

15396894656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15396894656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18899002080).

15396894656 is an abundant number, since it is smaller than the sum of its proper divisors (22401109504).

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

15396894656 is a wasteful number, since it uses less digits than its factorization.

15396894656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223 (or 1213 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 62.

The spelling of 15396894656 in words is "fifteen billion, three hundred ninety-six million, eight hundred ninety-four thousand, six hundred fifty-six".