56505578 has 8 divisors (see below), whose sum is σ = 84857220. Its totient is φ = 28219840.

The previous prime is 56505557. The next prime is 56505607. The reversal of 56505578 is 87550565.

It can be written as a sum of positive squares in 2 ways, for example, as 56505289 + 289 = 7517^2 + 17^2 .

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

It is a super-2 number, since 2×56505578² = 6385760690228168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14273 + ... + 17796.

Almost surely, 2^56505578 is an apocalyptic number.

56505578 is a deficient number, since it is larger than the sum of its proper divisors (28351642).

56505578 is a wasteful number, since it uses less digits than its factorization.

56505578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32952.

The product of its (nonzero) digits is 210000, while the sum is 41.

The square root of 56505578 is about 7517.0192230697. The cubic root of 56505578 is about 383.7341412453.

It can be divided in two parts, 5650557 and 8, that added together give a palindrome (5650565).

The spelling of 56505578 in words is "fifty-six million, five hundred five thousand, five hundred seventy-eight".