16442640675 has 72 divisors (see below), whose sum is σ = 30171707280. Its totient is φ = 8556902400.

The previous prime is 16442640667. The next prime is 16442640727. The reversal of 16442640675 is 57604624461.

16442640675 is a `hidden beast` number, since 164 + 426 + 4 + 0 + 67 + 5 = 666.

It is not a de Polignac number, because 16442640675 - 2³ = 16442640667 is a prime.

It is a super-3 number, since 3×16442640675³ (a number of 32 digits) contains 333 as substring.

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 16442640675.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1814155 + ... + 1823195.

It is an arithmetic number, because the mean of its divisors is an integer number (419051490).

Almost surely, 2^16442640675 is an apocalyptic number.

16442640675 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16442640675 is a deficient number, since it is larger than the sum of its proper divisors (13729066605).

16442640675 is a wasteful number, since it uses less digits than its factorization.

16442640675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9253 (or 9245 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 16442640675 in words is "sixteen billion, four hundred forty-two million, six hundred forty thousand, six hundred seventy-five".