56457988509 has 8 divisors (see below), whose sum is σ = 81067880992. Its totient is φ = 34743377520.

The previous prime is 56457988493. The next prime is 56457988513. The reversal of 56457988509 is 90588975465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56457988509 - 2⁴ = 56457988493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56457988509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56457988529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723820327 + ... + 723820404.

It is an arithmetic number, because the mean of its divisors is an integer number (10133485124).

Almost surely, 2^56457988509 is an apocalyptic number.

It is an amenable number.

56457988509 is a deficient number, since it is larger than the sum of its proper divisors (24609892483).

56457988509 is a wasteful number, since it uses less digits than its factorization.

56457988509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447640747.

The product of its (nonzero) digits is 108864000, while the sum is 66.

The spelling of 56457988509 in words is "fifty-six billion, four hundred fifty-seven million, nine hundred eighty-eight thousand, five hundred nine".