56780899440 has 80 divisors (see below), whose sum is σ = 177305714208. Its totient is φ = 15031042048.

The previous prime is 56780899403. The next prime is 56780899451. The reversal of 56780899440 is 4499808765.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830577 + ... + 896336.

Almost surely, 2^56780899440 is an apocalyptic number.

It is an amenable number.

56780899440 is an abundant number, since it is smaller than the sum of its proper divisors (120524814768).

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

56780899440 is a wasteful number, since it uses less digits than its factorization.

56780899440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727066 (or 1727060 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 56780899440 in words is "fifty-six billion, seven hundred eighty million, eight hundred ninety-nine thousand, four hundred forty".