56440940939 has 4 divisors (see below), whose sum is σ = 56687408160. Its totient is φ = 56194473720.

The previous prime is 56440940929. The next prime is 56440940957. The reversal of 56440940939 is 93904904465.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56440940939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56440940909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123233267 + ... + 123233724.

It is an arithmetic number, because the mean of its divisors is an integer number (14171852040).

Almost surely, 2^56440940939 is an apocalyptic number.

56440940939 is a deficient number, since it is larger than the sum of its proper divisors (246467221).

56440940939 is a wasteful number, since it uses less digits than its factorization.

56440940939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246467220.

The product of its (nonzero) digits is 4199040, while the sum is 53.

The spelling of 56440940939 in words is "fifty-six billion, four hundred forty million, nine hundred forty thousand, nine hundred thirty-nine".