56109018 has 48 divisors (see below), whose sum is σ = 131574240. Its totient is φ = 15904224.

The previous prime is 56109017. The next prime is 56109019. The reversal of 56109018 is 81090165.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56109017) and next prime (56109019).

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

It is not an unprimeable number, because it can be changed into a prime (56109013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40180 + ... + 41552.

It is an arithmetic number, because the mean of its divisors is an integer number (2741130).

Almost surely, 2^56109018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56109018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65787120).

56109018 is an abundant number, since it is smaller than the sum of its proper divisors (75465222).

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

56109018 is a wasteful number, since it uses less digits than its factorization.

56109018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531 (or 1524 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 56109018 is about 7490.5953034455. The cubic root of 56109018 is about 382.8343422095.

The spelling of 56109018 in words is "fifty-six million, one hundred nine thousand, eighteen".