56991440194 has 16 divisors (see below), whose sum is σ = 92243987640. Its totient is φ = 26252058240.

The previous prime is 56991440189. The next prime is 56991440221. The reversal of 56991440194 is 49104419965.

It can be written as a sum of positive squares in 4 ways, for example, as 49611771169 + 7379669025 = 222737^2 + 85905^2 .

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 7 ways as a sum of consecutive naturals, for example, 2139987 + ... + 2166454.

Almost surely, 2^56991440194 is an apocalyptic number.

56991440194 is a deficient number, since it is larger than the sum of its proper divisors (35252547446).

56991440194 is a wasteful number, since it uses less digits than its factorization.

56991440194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4306965.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 56991440194 in words is "fifty-six billion, nine hundred ninety-one million, four hundred forty thousand, one hundred ninety-four".