16640377684 has 12 divisors (see below), whose sum is σ = 33280755424. Its totient is φ = 7131590424.

The previous prime is 16640377681. The next prime is 16640377703. The reversal of 16640377684 is 48677304661.

16640377684 is an admirable number.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16640377681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297149574 + ... + 297149629.

Almost surely, 2^16640377684 is an apocalyptic number.

16640377684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16640377684 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16640377684 is a wasteful number, since it uses less digits than its factorization.

16640377684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594299214 (or 594299212 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 16640377684 in words is "sixteen billion, six hundred forty million, three hundred seventy-seven thousand, six hundred eighty-four".