16440635684 has 24 divisors (see below), whose sum is σ = 31764827808. Its totient is φ = 7382978240.

The previous prime is 16440635657. The next prime is 16440635693. The reversal of 16440635684 is 48653604461.

It is a super-3 number, since 3×16440635684³ (a number of 32 digits) contains 333 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, 2247257 + ... + 2254560.

It is an arithmetic number, because the mean of its divisors is an integer number (1323534492).

Almost surely, 2^16440635684 is an apocalyptic number.

It is an amenable number.

16440635684 is a deficient number, since it is larger than the sum of its proper divisors (15324192124).

16440635684 is a wasteful number, since it uses less digits than its factorization.

16440635684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501915 (or 4501913 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 16440635684 in words is "sixteen billion, four hundred forty million, six hundred thirty-five thousand, six hundred eighty-four".