15474545856 has 280 divisors, whose sum is σ = 57191794176. Its totient is φ = 4019258880.

The previous prime is 15474545809. The next prime is 15474545873. The reversal of 15474545856 is 65854547451.

15474545856 is a `hidden beast` number, since 1 + 5 + 4 + 7 + 4 + 54 + 585 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 379785 + ... + 418551.

Almost surely, 2^15474545856 is an apocalyptic number.

15474545856 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 15474545856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28595897088).

15474545856 is an abundant number, since it is smaller than the sum of its proper divisors (41717248320).

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

15474545856 is a wasteful number, since it uses less digits than its factorization.

15474545856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38809 (or 38790 counting only the distinct ones).

The product of its digits is 13440000, while the sum is 54.

The spelling of 15474545856 in words is "fifteen billion, four hundred seventy-four million, five hundred forty-five thousand, eight hundred fifty-six".