56051001020 has 72 divisors (see below), whose sum is σ = 137064314016. Its totient is φ = 19197876096.

The previous prime is 56051001007. The next prime is 56051001037. The reversal of 56051001020 is 2010015065.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 56051000983 and 56051001001.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 948377 + ... + 1005743.

It is an arithmetic number, because the mean of its divisors is an integer number (1903671028).

Almost surely, 2^56051001020 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 56051001020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68532157008).

56051001020 is an abundant number, since it is smaller than the sum of its proper divisors (81013312996).

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

56051001020 is a wasteful number, since it uses less digits than its factorization.

56051001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58387 (or 58378 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 56051001020 its reverse (2010015065), we get a palindrome (58061016085).

The spelling of 56051001020 in words is "fifty-six billion, fifty-one million, one thousand, twenty".