56400565 has 8 divisors (see below), whose sum is σ = 72886968. Its totient is φ = 41649600.

The previous prime is 56400541. The next prime is 56400601. The reversal of 56400565 is 56500465.

It can be written as a sum of positive squares in 4 ways, for example, as 5049009 + 51351556 = 2247^2 + 7166^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56400565 - 2⁷ = 56400437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433786 + ... + 433915.

It is an arithmetic number, because the mean of its divisors is an integer number (9110871).

Almost surely, 2^56400565 is an apocalyptic number.

It is an amenable number.

56400565 is a deficient number, since it is larger than the sum of its proper divisors (16486403).

56400565 is a wasteful number, since it uses less digits than its factorization.

56400565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867719.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 56400565 is about 7510.0309586579. The cubic root of 56400565 is about 383.4962764538.

It can be divided in two parts, 56400 and 565, that added together give a palindrome (56965).

The spelling of 56400565 in words is "fifty-six million, four hundred thousand, five hundred sixty-five".