56515509983 has 4 divisors (see below), whose sum is σ = 56519397888. Its totient is φ = 56511622080.

The previous prime is 56515509949. The next prime is 56515510019. The reversal of 56515509983 is 38990551565.

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

It is a cyclic number.

It is not a de Polignac number, because 56515509983 - 2¹⁴ = 56515493599 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 (56515509383) 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, 1922066 + ... + 1951247.

It is an arithmetic number, because the mean of its divisors is an integer number (14129849472).

Almost surely, 2^56515509983 is an apocalyptic number.

56515509983 is a deficient number, since it is larger than the sum of its proper divisors (3887905).

56515509983 is a wasteful number, since it uses less digits than its factorization.

56515509983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3887904.

The product of its (nonzero) digits is 7290000, while the sum is 56.

The spelling of 56515509983 in words is "fifty-six billion, five hundred fifteen million, five hundred nine thousand, nine hundred eighty-three".