56424113621 has 4 divisors (see below), whose sum is σ = 57005805612. Its totient is φ = 55842421632.

The previous prime is 56424113617. The next prime is 56424113623. The reversal of 56424113621 is 12631142465.

56424113621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43091947396 + 13332166225 = 207586^2 + 115465^2 .

It is a cyclic number.

It is not a de Polignac number, because 56424113621 - 2² = 56424113617 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 (56424113623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290845850 + ... + 290846043.

It is an arithmetic number, because the mean of its divisors is an integer number (14251451403).

Almost surely, 2^56424113621 is an apocalyptic number.

It is an amenable number.

56424113621 is a deficient number, since it is larger than the sum of its proper divisors (581691991).

56424113621 is an equidigital number, since it uses as much as digits as its factorization.

56424113621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581691990.

The product of its digits is 34560, while the sum is 35.

The spelling of 56424113621 in words is "fifty-six billion, four hundred twenty-four million, one hundred thirteen thousand, six hundred twenty-one".