54056560621 has 4 divisors (see below), whose sum is σ = 61778926432. Its totient is φ = 46334194812.

The previous prime is 54056560609. The next prime is 54056560627. The reversal of 54056560621 is 12606565045.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12606565045 = 5 ⋅2521313009.

It is a cyclic number.

It is not a de Polignac number, because 54056560621 - 2²¹ = 54054463469 is a prime.

It is a super-2 number, since 2×54056560621² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54056560627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3861182895 + ... + 3861182908.

It is an arithmetic number, because the mean of its divisors is an integer number (15444731608).

Almost surely, 2^54056560621 is an apocalyptic number.

It is an amenable number.

54056560621 is a deficient number, since it is larger than the sum of its proper divisors (7722365811).

54056560621 is an equidigital number, since it uses as much as digits as its factorization.

54056560621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7722365810.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 54056560621 in words is "fifty-four billion, fifty-six million, five hundred sixty thousand, six hundred twenty-one".