56554211421 has 20 divisors (see below), whose sum is σ = 84574256800. Its totient is φ = 37661732136.

The previous prime is 56554211299. The next prime is 56554211471. The reversal of 56554211421 is 12411245565.

56554211421 is a `hidden beast` number, since 5 + 65 + 542 + 11 + 42 + 1 = 666.

56554211421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56554211421 - 2²⁵ = 56520656989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56554211471) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 305431 + ... + 454308.

It is an arithmetic number, because the mean of its divisors is an integer number (4228712840).

Almost surely, 2^56554211421 is an apocalyptic number.

It is an amenable number.

56554211421 is a deficient number, since it is larger than the sum of its proper divisors (28020045379).

56554211421 is an equidigital number, since it uses as much as digits as its factorization.

56554211421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760670 (or 760661 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

Adding to 56554211421 its reverse (12411245565), we get a palindrome (68965456986).

The spelling of 56554211421 in words is "fifty-six billion, five hundred fifty-four million, two hundred eleven thousand, four hundred twenty-one".