56361018 has 64 divisors (see below), whose sum is σ = 137445120. Its totient is φ = 15040512.

The previous prime is 56360987. The next prime is 56361077. The reversal of 56361018 is 81016365.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137598 + ... + 138006.

It is an arithmetic number, because the mean of its divisors is an integer number (2147580).

Almost surely, 2^56361018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56361018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68722560).

56361018 is an abundant number, since it is smaller than the sum of its proper divisors (81084102).

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

56361018 is a wasteful number, since it uses less digits than its factorization.

56361018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 56361018 is about 7507.3975517485. The cubic root of 56361018 is about 383.4066220720.

The spelling of 56361018 in words is "fifty-six million, three hundred sixty-one thousand, eighteen".