56927428517 has 4 divisors (see below), whose sum is σ = 56928576300. Its totient is φ = 56926280736.

The previous prime is 56927428511. The next prime is 56927428577. The reversal of 56927428517 is 71582472965.

56927428517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71582472965 = 5 ⋅14316494593.

It can be written as a sum of positive squares in 2 ways, for example, as 4504288996 + 52423139521 = 67114^2 + 228961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56927428517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56927428511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495968 + ... + 599865.

It is an arithmetic number, because the mean of its divisors is an integer number (14232144075).

Almost surely, 2^56927428517 is an apocalyptic number.

It is an amenable number.

56927428517 is a deficient number, since it is larger than the sum of its proper divisors (1147783).

56927428517 is a wasteful number, since it uses less digits than its factorization.

56927428517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147782.

The product of its digits is 8467200, while the sum is 56.

The spelling of 56927428517 in words is "fifty-six billion, nine hundred twenty-seven million, four hundred twenty-eight thousand, five hundred seventeen".