16640390375 has 16 divisors (see below), whose sum is σ = 23733952320. Its totient is φ = 11410552800.

The previous prime is 16640390329. The next prime is 16640390401. The reversal of 16640390375 is 57309304661.

It is a happy number.

It is not a de Polignac number, because 16640390375 - 2¹⁴ = 16640373991 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9507920 + ... + 9509669.

It is an arithmetic number, because the mean of its divisors is an integer number (1483372020).

Almost surely, 2^16640390375 is an apocalyptic number.

16640390375 is a deficient number, since it is larger than the sum of its proper divisors (7093561945).

16640390375 is an equidigital number, since it uses as much as digits as its factorization.

16640390375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19017611 (or 19017601 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 44.

The spelling of 16640390375 in words is "sixteen billion, six hundred forty million, three hundred ninety thousand, three hundred seventy-five".