556532521956 has 144 divisors (see below), whose sum is σ = 1539434332800. Its totient is φ = 175450758912.

The previous prime is 556532521939. The next prime is 556532521967. The reversal of 556532521956 is 659125235655.

556532521956 is a `hidden beast` number, since 5 + 5 + 6 + 532 + 52 + 1 + 9 + 56 = 666.

556532521956 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 47 ways as a sum of consecutive naturals, for example, 1849830 + ... + 2129538.

It is an arithmetic number, because the mean of its divisors is an integer number (10690516200).

Almost surely, 2^556532521956 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 556532521956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769717166400).

556532521956 is an abundant number, since it is smaller than the sum of its proper divisors (982901810844).

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

556532521956 is a wasteful number, since it uses less digits than its factorization.

556532521956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279840 (or 279826 counting only the distinct ones).

The product of its digits is 12150000, while the sum is 54.

The spelling of 556532521956 in words is "five hundred fifty-six billion, five hundred thirty-two million, five hundred twenty-one thousand, nine hundred fifty-six".