55645508 has 12 divisors (see below), whose sum is σ = 97657980. Its totient is φ = 27743232.

The previous prime is 55645507. The next prime is 55645517. The reversal of 55645508 is 80554655.

It can be written as a sum of positive squares in 2 ways, for example, as 26399044 + 29246464 = 5138^2 + 5408^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55645501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18293 + ... + 21116.

It is an arithmetic number, because the mean of its divisors is an integer number (8138165).

Almost surely, 2^55645508 is an apocalyptic number.

It is an amenable number.

55645508 is a deficient number, since it is larger than the sum of its proper divisors (42012472).

55645508 is a wasteful number, since it uses less digits than its factorization.

55645508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39766 (or 39764 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 38.

The square root of 55645508 is about 7459.5916778333. The cubic root of 55645508 is about 381.7772428243. Note that the first 3 decimals are identical.

It can be divided in two parts, 556 and 45508, that added together give a palindrome (46064).

The spelling of 55645508 in words is "fifty-five million, six hundred forty-five thousand, five hundred eight".