16640629172 has 24 divisors (see below), whose sum is σ = 30660668640. Its totient is φ = 7880634720.

The previous prime is 16640629169. The next prime is 16640629177. The reversal of 16640629172 is 27192604661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16640629177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354647 + ... + 398817.

It is an arithmetic number, because the mean of its divisors is an integer number (1277527860).

Almost surely, 2^16640629172 is an apocalyptic number.

It is an amenable number.

16640629172 is a deficient number, since it is larger than the sum of its proper divisors (14020039468).

16640629172 is a wasteful number, since it uses less digits than its factorization.

16640629172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49151 (or 49149 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 16640629172 in words is "sixteen billion, six hundred forty million, six hundred twenty-nine thousand, one hundred seventy-two".