56271618 has 64 divisors (see below), whose sum is σ = 136684800. Its totient is φ = 17055360.

The previous prime is 56271617. The next prime is 56271619. The reversal of 56271618 is 81617265.

56271618 is a `hidden beast` number, since 5 + 627 + 16 + 18 = 666.

It is an interprime number because it is at equal distance from previous prime (56271617) and next prime (56271619).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (56271617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49278 + ... + 50406.

It is an arithmetic number, because the mean of its divisors is an integer number (2135700).

Almost surely, 2^56271618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56271618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68342400).

56271618 is an abundant number, since it is smaller than the sum of its proper divisors (80413182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56271618 is a wasteful number, since it uses less digits than its factorization.

56271618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224 (or 1218 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 56271618 is about 7501.4410615561. The cubic root of 56271618 is about 383.2037945836.

The spelling of 56271618 in words is "fifty-six million, two hundred seventy-one thousand, six hundred eighteen".