54698721872 has 20 divisors (see below), whose sum is σ = 106020890196. Its totient is φ = 27338492160.

The previous prime is 54698721829. The next prime is 54698721887. The reversal of 54698721872 is 27812789645.

It can be written as a sum of positive squares in 2 ways, for example, as 1557407296 + 53141314576 = 39464^2 + 230524^2 .

It is a super-2 number, since 2×54698721872² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637703 + ... + 718374.

Almost surely, 2^54698721872 is an apocalyptic number.

It is an amenable number.

54698721872 is a deficient number, since it is larger than the sum of its proper divisors (51322168324).

54698721872 is a wasteful number, since it uses less digits than its factorization.

54698721872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358606 (or 1358600 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 59.

The spelling of 54698721872 in words is "fifty-four billion, six hundred ninety-eight million, seven hundred twenty-one thousand, eight hundred seventy-two".