56861142516 has 18 divisors (see below), whose sum is σ = 143732332562. Its totient is φ = 18953714160.

The previous prime is 56861142511. The next prime is 56861142551. The reversal of 56861142516 is 61524116865.

56861142516 is a `hidden beast` number, since 5 + 6 + 8 + 611 + 4 + 25 + 1 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 52008626916 + 4852515600 = 228054^2 + 69660^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56861142511) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 789738055 + ... + 789738126.

Almost surely, 2^56861142516 is an apocalyptic number.

It is an amenable number.

56861142516 is an abundant number, since it is smaller than the sum of its proper divisors (86871190046).

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

56861142516 is a wasteful number, since it uses less digits than its factorization.

56861142516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579476191 (or 1579476186 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The spelling of 56861142516 in words is "fifty-six billion, eight hundred sixty-one million, one hundred forty-two thousand, five hundred sixteen".