56091081018 has 32 divisors (see below), whose sum is σ = 135749844864. Its totient is φ = 15083315712.

The previous prime is 56091081017. The next prime is 56091081037. The reversal of 56091081018 is 81018019065.

It is not an unprimeable number, because it can be changed into a prime (56091081017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39278755 + ... + 39280182.

It is an arithmetic number, because the mean of its divisors is an integer number (4242182652).

Almost surely, 2^56091081018 is an apocalyptic number.

56091081018 is an abundant number, since it is smaller than the sum of its proper divisors (79658763846).

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

56091081018 is a wasteful number, since it uses less digits than its factorization.

56091081018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78558966.

The product of its (nonzero) digits is 17280, while the sum is 39.

The spelling of 56091081018 in words is "fifty-six billion, ninety-one million, eighty-one thousand, eighteen".