16909431612 has 24 divisors (see below), whose sum is σ = 39458837712. Its totient is φ = 5635977600.

The previous prime is 16909431607. The next prime is 16909431613. The reversal of 16909431612 is 21613490961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16909431613) 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, 94312 + ... + 206672.

It is an arithmetic number, because the mean of its divisors is an integer number (1644118238).

Almost surely, 2^16909431612 is an apocalyptic number.

16909431612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16909431612 is an abundant number, since it is smaller than the sum of its proper divisors (22549406100).

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

16909431612 is a wasteful number, since it uses less digits than its factorization.

16909431612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124909 (or 124907 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 16909431612 in words is "sixteen billion, nine hundred nine million, four hundred thirty-one thousand, six hundred twelve".