55991635 has 16 divisors (see below), whose sum is σ = 77184000. Its totient is φ = 38196576.

The previous prime is 55991603. The next prime is 55991669. The reversal of 55991635 is 53619955.

It is a cyclic number.

It is not a de Polignac number, because 55991635 - 2⁵ = 55991603 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55991591 and 55991600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2946 + ... + 10984.

It is an arithmetic number, because the mean of its divisors is an integer number (4824000).

Almost surely, 2^55991635 is an apocalyptic number.

55991635 is a deficient number, since it is larger than the sum of its proper divisors (21192365).

55991635 is a wasteful number, since it uses less digits than its factorization.

55991635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8250.

The product of its digits is 182250, while the sum is 43.

The square root of 55991635 is about 7482.7558426024. The cubic root of 55991635 is about 382.5671859995.

The spelling of 55991635 in words is "fifty-five million, nine hundred ninety-one thousand, six hundred thirty-five".