55584560621 has 4 divisors (see below), whose sum is σ = 58001280672. Its totient is φ = 53167840572.

The previous prime is 55584560599. The next prime is 55584560627. The reversal of 55584560621 is 12606548555.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55584560621 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 (55584560627) 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, 1208359991 + ... + 1208360036.

It is an arithmetic number, because the mean of its divisors is an integer number (14500320168).

Almost surely, 2^55584560621 is an apocalyptic number.

It is an amenable number.

55584560621 is a deficient number, since it is larger than the sum of its proper divisors (2416720051).

55584560621 is a wasteful number, since it uses less digits than its factorization.

55584560621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416720050.

The product of its (nonzero) digits is 1440000, while the sum is 47.

The spelling of 55584560621 in words is "fifty-five billion, five hundred eighty-four million, five hundred sixty thousand, six hundred twenty-one".