16640945832 has 64 divisors (see below), whose sum is σ = 49612769280. Its totient is φ = 4547835072.

The previous prime is 16640945831. The next prime is 16640945833. The reversal of 16640945832 is 23854904661.

It is an interprime number because it is at equal distance from previous prime (16640945831) and next prime (16640945833).

It is not an unprimeable number, because it can be changed into a prime (16640945831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2149468 + ... + 2157195.

It is an arithmetic number, because the mean of its divisors is an integer number (775199520).

Almost surely, 2^16640945832 is an apocalyptic number.

16640945832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16640945832 is an abundant number, since it is smaller than the sum of its proper divisors (32971823448).

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

16640945832 is a wasteful number, since it uses less digits than its factorization.

16640945832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306702 (or 4306698 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 16640945832 in words is "sixteen billion, six hundred forty million, nine hundred forty-five thousand, eight hundred thirty-two".