56881289586 has 64 divisors (see below), whose sum is σ = 127729405440. Its totient is φ = 16740359040.

The previous prime is 56881289497. The next prime is 56881289603. The reversal of 56881289586 is 68598218865.

It is a happy number.

It is a super-2 number, since 2×56881289586² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (66).

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, 235206 + ... + 411198.

It is an arithmetic number, because the mean of its divisors is an integer number (1995771960).

Almost surely, 2^56881289586 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56881289586, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63864702720).

56881289586 is an abundant number, since it is smaller than the sum of its proper divisors (70848115854).

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

56881289586 is a wasteful number, since it uses less digits than its factorization.

56881289586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176151.

The product of its digits is 66355200, while the sum is 66.

The spelling of 56881289586 in words is "fifty-six billion, eight hundred eighty-one million, two hundred eighty-nine thousand, five hundred eighty-six".