55805508 has 72 divisors (see below), whose sum is σ = 162009120. Its totient is φ = 16018560.

The previous prime is 55805501. The next prime is 55805513. The reversal of 55805508 is 80550855.

It is a super-2 number, since 2×55805508² = 6228509446276128, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (55805501) 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 23 ways as a sum of consecutive naturals, for example, 3816 + ... + 11232.

Almost surely, 2^55805508 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55805508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81004560).

55805508 is an abundant number, since it is smaller than the sum of its proper divisors (106203612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55805508 is a wasteful number, since it uses less digits than its factorization.

55805508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7457 (or 7452 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 36.

The square root of 55805508 is about 7470.3084273676. The cubic root of 55805508 is about 382.1428063603.

The spelling of 55805508 in words is "fifty-five million, eight hundred five thousand, five hundred eight".