56172390739 has 24 divisors (see below), whose sum is σ = 59099788800. Its totient is φ = 53381217792.

The previous prime is 56172390689. The next prime is 56172390749. The reversal of 56172390739 is 93709327165.

It is not a de Polignac number, because 56172390739 - 2¹⁵ = 56172357971 is a prime.

It is a super-2 number, since 2×56172390739² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56172390749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14157934 + ... + 14161900.

It is an arithmetic number, because the mean of its divisors is an integer number (2462491200).

Almost surely, 2^56172390739 is an apocalyptic number.

56172390739 is a deficient number, since it is larger than the sum of its proper divisors (2927398061).

56172390739 is a wasteful number, since it uses less digits than its factorization.

56172390739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287 (or 4258 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 52.

The spelling of 56172390739 in words is "fifty-six billion, one hundred seventy-two million, three hundred ninety thousand, seven hundred thirty-nine".