55236413564721 has 12 divisors (see below), whose sum is σ = 79787786189748. Its totient is φ = 36823419332064.

The previous prime is 55236413564669. The next prime is 55236413564723. The reversal of 55236413564721 is 12746531463255.

55236413564721 is a `hidden beast` number, since 5 + 5 + 2 + 3 + 6 + 4 + 1 + 3 + 564 + 72 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39179274642225 + 16057138922496 = 6259335^2 + 4007136^2 .

It is not a de Polignac number, because 55236413564721 - 2¹³ = 55236413556529 is a prime.

It is a super-2 number, since 2×55236413564721² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55236413564723) 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, 70956190 + ... + 71730423.

It is an arithmetic number, because the mean of its divisors is an integer number (6648982182479).

Almost surely, 2^{55236413564721} is an apocalyptic number.

It is an amenable number.

55236413564721 is a deficient number, since it is larger than the sum of its proper divisors (24551372625027).

55236413564721 is a wasteful number, since it uses less digits than its factorization.

55236413564721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142729632 (or 142729629 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 54.

The spelling of 55236413564721 in words is "fifty-five trillion, two hundred thirty-six billion, four hundred thirteen million, five hundred sixty-four thousand, seven hundred twenty-one".