164457855 has 24 divisors (see below), whose sum is σ = 288674880. Its totient is φ = 86598720.

The previous prime is 164457851. The next prime is 164457857. The reversal of 164457855 is 558754461.

It is not a de Polignac number, because 164457855 - 2² = 164457851 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 164457855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164457851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19576 + ... + 26685.

It is an arithmetic number, because the mean of its divisors is an integer number (12028120).

Almost surely, 2^164457855 is an apocalyptic number.

164457855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

164457855 is a deficient number, since it is larger than the sum of its proper divisors (124217025).

164457855 is a wasteful number, since it uses less digits than its factorization.

164457855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46351 (or 46348 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The square root of 164457855 is about 12824.1122499766. The cubic root of 164457855 is about 547.8792768239.

The spelling of 164457855 in words is "one hundred sixty-four million, four hundred fifty-seven thousand, eight hundred fifty-five".