55973572020 has 144 divisors (see below), whose sum is σ = 184986607680. Its totient is φ = 14048229888.

The previous prime is 55973571937. The next prime is 55973572021. The reversal of 55973572020 is 2027537955.

55973572020 is a `hidden beast` number, since 5 + 5 + 9 + 73 + 572 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55973572021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23274 + ... + 335393.

It is an arithmetic number, because the mean of its divisors is an integer number (1284629220).

Almost surely, 2^55973572020 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 55973572020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92493303840).

55973572020 is an abundant number, since it is smaller than the sum of its proper divisors (129013035660).

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

55973572020 is a wasteful number, since it uses less digits than its factorization.

55973572020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358719 (or 358694 counting only the distinct ones).

The product of its (nonzero) digits is 661500, while the sum is 45.

The spelling of 55973572020 in words is "fifty-five billion, nine hundred seventy-three million, five hundred seventy-two thousand, twenty".