55613621547 has 128 divisors (see below), whose sum is σ = 96694272000. Its totient is φ = 31496493600.

The previous prime is 55613621537. The next prime is 55613621587. The reversal of 55613621547 is 74512631655.

55613621547 is a `hidden beast` number, since 5 + 5 + 6 + 13 + 621 + 5 + 4 + 7 = 666.

55613621547 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 55613621547 - 2²⁰ = 55612572971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55613621537) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 53940922 + ... + 53941952.

It is an arithmetic number, because the mean of its divisors is an integer number (755424000).

Almost surely, 2^55613621547 is an apocalyptic number.

55613621547 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

55613621547 is a deficient number, since it is larger than the sum of its proper divisors (41080650453).

55613621547 is a wasteful number, since it uses less digits than its factorization.

55613621547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171 (or 1143 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The spelling of 55613621547 in words is "fifty-five billion, six hundred thirteen million, six hundred twenty-one thousand, five hundred forty-seven".