56498781321 has 12 divisors (see below), whose sum is σ = 83507243248. Its totient is φ = 36789903864.

The previous prime is 56498781307. The next prime is 56498781329. The reversal of 56498781321 is 12318789465.

56498781321 is a `hidden beast` number, since 56 + 498 + 7 + 81 + 3 + 21 = 666.

It is not a de Polignac number, because 56498781321 - 2⁵ = 56498781289 is a prime.

It is a super-2 number, since 2×56498781321² (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 (56498781329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72995455 + ... + 72996228.

Almost surely, 2^56498781321 is an apocalyptic number.

It is an amenable number.

56498781321 is a deficient number, since it is larger than the sum of its proper divisors (27008461927).

56498781321 is a wasteful number, since it uses less digits than its factorization.

56498781321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145991732 (or 145991729 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 56498781321 in words is "fifty-six billion, four hundred ninety-eight million, seven hundred eighty-one thousand, three hundred twenty-one".