55621112832 has 176 divisors, whose sum is σ = 170405380800. Its totient is φ = 17900789760.

The previous prime is 55621112831. The next prime is 55621112843. The reversal of 55621112832 is 23821112655.

55621112832 is a `hidden beast` number, since 5 + 5 + 621 + 1 + 1 + 28 + 3 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55621112831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 767107 + ... + 836477.

Almost surely, 2^55621112832 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 55621112832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85202690400).

55621112832 is an abundant number, since it is smaller than the sum of its proper divisors (114784267968).

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

55621112832 is a wasteful number, since it uses less digits than its factorization.

55621112832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69429 (or 69405 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The spelling of 55621112832 in words is "fifty-five billion, six hundred twenty-one million, one hundred twelve thousand, eight hundred thirty-two".