56161605 has 16 divisors (see below), whose sum is σ = 90094464. Its totient is φ = 29874240.

The previous prime is 56161583. The next prime is 56161627. The reversal of 56161605 is 50616165.

It is an interprime number because it is at equal distance from previous prime (56161583) and next prime (56161627).

It is not a de Polignac number, because 56161605 - 2¹⁰ = 56160581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1240 + ... + 10670.

It is an arithmetic number, because the mean of its divisors is an integer number (5630904).

Almost surely, 2^56161605 is an apocalyptic number.

It is an amenable number.

56161605 is a deficient number, since it is larger than the sum of its proper divisors (33932859).

56161605 is a wasteful number, since it uses less digits than its factorization.

56161605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9836.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 56161605 is about 7494.1046830158. The cubic root of 56161605 is about 382.9539060163.

It can be divided in two parts, 5616160 and 5, that added together give a palindrome (5616165).

The spelling of 56161605 in words is "fifty-six million, one hundred sixty-one thousand, six hundred five".