155664636 has 24 divisors (see below), whose sum is σ = 363460944. Its totient is φ = 51853440.

The previous prime is 155664629. The next prime is 155664637. The reversal of 155664636 is 636466551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155664637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19566 + ... + 26346.

It is an arithmetic number, because the mean of its divisors is an integer number (15144206).

Almost surely, 2^155664636 is an apocalyptic number.

It is an amenable number.

155664636 is an abundant number, since it is smaller than the sum of its proper divisors (207796308).

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

155664636 is a wasteful number, since it uses less digits than its factorization.

155664636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8701 (or 8699 counting only the distinct ones).

The product of its digits is 388800, while the sum is 42.

The square root of 155664636 is about 12476.5634691609. The cubic root of 155664636 is about 537.9352289551.

It can be divided in two parts, 15566 and 4636, that added together give a palindrome (20202).

The spelling of 155664636 in words is "one hundred fifty-five million, six hundred sixty-four thousand, six hundred thirty-six".