12295216640 has 80 divisors (see below), whose sum is σ = 33691138272. Its totient is φ = 4215496704.

The previous prime is 12295216631. The next prime is 12295216709. The reversal of 12295216640 is 4661259221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 12295216594 and 12295216603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325139 + ... + 360978.

Almost surely, 2^12295216640 is an apocalyptic number.

12295216640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12295216640 is an abundant number, since it is smaller than the sum of its proper divisors (21395921632).

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

12295216640 is an frugal number, since it uses more digits than its factorization.

12295216640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686147 (or 686131 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 12295216640 in words is "twelve billion, two hundred ninety-five million, two hundred sixteen thousand, six hundred forty".