55611790 has 32 divisors (see below), whose sum is σ = 108553536. Its totient is φ = 20390400.

The previous prime is 55611779. The next prime is 55611791. The reversal of 55611790 is 9711655.

55611790 = 1658² + 1659² + ... + 1677².

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55611791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18214 + ... + 21046.

It is an arithmetic number, because the mean of its divisors is an integer number (3392298).

Almost surely, 2^55611790 is an apocalyptic number.

55611790 is a deficient number, since it is larger than the sum of its proper divisors (52941746).

55611790 is a wasteful number, since it uses less digits than its factorization.

55611790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 55611790 is about 7457.3312920910. The cubic root of 55611790 is about 381.7001155085.

The spelling of 55611790 in words is "fifty-five million, six hundred eleven thousand, seven hundred ninety".