55581635 has 16 divisors (see below), whose sum is σ = 67952640. Its totient is φ = 43636320.

The previous prime is 55581623. The next prime is 55581641. The reversal of 55581635 is 53618555.

It is not a de Polignac number, because 55581635 - 2¹⁸ = 55319491 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 87770 + ... + 88400.

It is an arithmetic number, because the mean of its divisors is an integer number (4247040).

Almost surely, 2^55581635 is an apocalyptic number.

55581635 is a deficient number, since it is larger than the sum of its proper divisors (12371005).

55581635 is a wasteful number, since it uses less digits than its factorization.

55581635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938.

The product of its digits is 90000, while the sum is 38.

The square root of 55581635 is about 7455.3091820527. The cubic root of 55581635 is about 381.6311118671.

The spelling of 55581635 in words is "fifty-five million, five hundred eighty-one thousand, six hundred thirty-five".