55561725072 has 480 divisors, whose sum is σ = 188924542976. Its totient is φ = 14911257600.

The previous prime is 55561725067. The next prime is 55561725083. The reversal of 55561725072 is 27052716555.

55561725072 is a `hidden beast` number, since 5 + 5 + 5 + 617 + 25 + 0 + 7 + 2 = 666.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 196331043 + ... + 196331325.

Almost surely, 2^55561725072 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 55561725072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94462271488).

55561725072 is an abundant number, since it is smaller than the sum of its proper divisors (133362817904).

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

55561725072 is a wasteful number, since it uses less digits than its factorization.

55561725072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 735000, while the sum is 45.

The spelling of 55561725072 in words is "fifty-five billion, five hundred sixty-one million, seven hundred twenty-five thousand, seventy-two".