12170907640 has 16 divisors (see below), whose sum is σ = 27384542280. Its totient is φ = 4868363040.

The previous prime is 12170907599. The next prime is 12170907641. The reversal of 12170907640 is 4670907121.

It is a self number, because there is not a number n which added to its sum of digits gives 12170907640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12170907641) 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, 152136306 + ... + 152136385.

Almost surely, 2^12170907640 is an apocalyptic number.

12170907640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12170907640 is an abundant number, since it is smaller than the sum of its proper divisors (15213634640).

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

12170907640 is a wasteful number, since it uses less digits than its factorization.

12170907640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304272702 (or 304272698 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The spelling of 12170907640 in words is "twelve billion, one hundred seventy million, nine hundred seven thousand, six hundred forty".