16474172618 has 4 divisors (see below), whose sum is σ = 24711258930. Its totient is φ = 8237086308.

The previous prime is 16474172549. The next prime is 16474172639. The reversal of 16474172618 is 81627147461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16421653609 + 52519009 = 128147^2 + 7247^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4118543153 + ... + 4118543156.

Almost surely, 2^16474172618 is an apocalyptic number.

16474172618 is a deficient number, since it is larger than the sum of its proper divisors (8237086312).

16474172618 is an equidigital number, since it uses as much as digits as its factorization.

16474172618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8237086311.

The product of its digits is 451584, while the sum is 47.

The spelling of 16474172618 in words is "sixteen billion, four hundred seventy-four million, one hundred seventy-two thousand, six hundred eighteen".