16645444154 has 16 divisors (see below), whose sum is σ = 25029658368. Its totient is φ = 8302251552.

The previous prime is 16645444139. The next prime is 16645444169. The reversal of 16645444154 is 45144454661.

It is an interprime number because it is at equal distance from previous prime (16645444139) and next prime (16645444169).

It is a super-2 number, since 2×16645444154² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1411607 + ... + 1423349.

It is an arithmetic number, because the mean of its divisors is an integer number (1564353648).

Almost surely, 2^16645444154 is an apocalyptic number.

16645444154 is a deficient number, since it is larger than the sum of its proper divisors (8384214214).

16645444154 is a wasteful number, since it uses less digits than its factorization.

16645444154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13429.

The product of its digits is 921600, while the sum is 44.

The spelling of 16645444154 in words is "sixteen billion, six hundred forty-five million, four hundred forty-four thousand, one hundred fifty-four".