56616577 has 4 divisors (see below), whose sum is σ = 57576240. Its totient is φ = 55656916.

The previous prime is 56616563. The next prime is 56616629. The reversal of 56616577 is 77561665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77561665 = 5 ⋅15512333.

It is a cyclic number.

It is not a de Polignac number, because 56616577 - 2¹¹ = 56614529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56610577) 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, 479743 + ... + 479860.

It is an arithmetic number, because the mean of its divisors is an integer number (14394060).

Almost surely, 2^56616577 is an apocalyptic number.

It is an amenable number.

56616577 is a deficient number, since it is larger than the sum of its proper divisors (959663).

56616577 is an equidigital number, since it uses as much as digits as its factorization.

56616577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959662.

The product of its digits is 264600, while the sum is 43.

The square root of 56616577 is about 7524.3987799691. The cubic root of 56616577 is about 383.9852447492.

The spelling of 56616577 in words is "fifty-six million, six hundred sixteen thousand, five hundred seventy-seven".