54361136721 has 16 divisors (see below), whose sum is σ = 77153601600. Its totient is φ = 33947578368.

The previous prime is 54361136719. The next prime is 54361136743. The reversal of 54361136721 is 12763116345.

It is not a de Polignac number, because 54361136721 - 2¹ = 54361136719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54361136721.

It is not an unprimeable number, because it can be changed into a prime (54361136771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5352816 + ... + 5362961.

It is an arithmetic number, because the mean of its divisors is an integer number (4822100100).

Almost surely, 2^54361136721 is an apocalyptic number.

It is an amenable number.

54361136721 is a deficient number, since it is larger than the sum of its proper divisors (22792464879).

54361136721 is a wasteful number, since it uses less digits than its factorization.

54361136721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10715888.

The product of its digits is 90720, while the sum is 39.

The spelling of 54361136721 in words is "fifty-four billion, three hundred sixty-one million, one hundred thirty-six thousand, seven hundred twenty-one".