55621410591 has 32 divisors (see below), whose sum is σ = 75840710400. Its totient is φ = 36252921600.

The previous prime is 55621410557. The next prime is 55621410599. The reversal of 55621410591 is 19501412655.

It is not a de Polignac number, because 55621410591 - 2⁶ = 55621410527 is a prime.

It is a super-2 number, since 2×55621410591² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55621410599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9506635 + ... + 9512483.

It is an arithmetic number, because the mean of its divisors is an integer number (2370022200).

Almost surely, 2^55621410591 is an apocalyptic number.

55621410591 is a deficient number, since it is larger than the sum of its proper divisors (20219299809).

55621410591 is a wasteful number, since it uses less digits than its factorization.

55621410591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6327.

The product of its (nonzero) digits is 54000, while the sum is 39.

The spelling of 55621410591 in words is "fifty-five billion, six hundred twenty-one million, four hundred ten thousand, five hundred ninety-one".