56515833877 has 4 divisors (see below), whose sum is σ = 56620299916. Its totient is φ = 56411367840.

The previous prime is 56515833809. The next prime is 56515833949. The reversal of 56515833877 is 77833851565.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38720007076 + 17795826801 = 196774^2 + 133401^2 .

It is a cyclic number.

It is not a de Polignac number, because 56515833877 - 2¹⁹ = 56515309589 is a prime.

It is a super-2 number, since 2×56515833877² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56515833677) 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, 52232208 + ... + 52233289.

It is an arithmetic number, because the mean of its divisors is an integer number (14155074979).

Almost surely, 2^56515833877 is an apocalyptic number.

It is an amenable number.

56515833877 is a deficient number, since it is larger than the sum of its proper divisors (104466039).

56515833877 is a wasteful number, since it uses less digits than its factorization.

56515833877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104466038.

The product of its digits is 21168000, while the sum is 58.

The spelling of 56515833877 in words is "fifty-six billion, five hundred fifteen million, eight hundred thirty-three thousand, eight hundred seventy-seven".