56161778 has 16 divisors (see below), whose sum is σ = 89472600. Its totient is φ = 26347776.

The previous prime is 56161697. The next prime is 56161789. The reversal of 56161778 is 87716165.

It can be written as a sum of positive squares in 4 ways, for example, as 51308569 + 4853209 = 7163^2 + 2203^2 .

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, 9500 + ... + 14232.

Almost surely, 2^56161778 is an apocalyptic number.

56161778 is a deficient number, since it is larger than the sum of its proper divisors (33310822).

56161778 is a wasteful number, since it uses less digits than its factorization.

56161778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101.

The product of its digits is 70560, while the sum is 41.

The square root of 56161778 is about 7494.1162254131. The cubic root of 56161778 is about 382.9542992325.

The spelling of 56161778 in words is "fifty-six million, one hundred sixty-one thousand, seven hundred seventy-eight".