12807661920 has 48 divisors (see below), whose sum is σ = 40344136560. Its totient is φ = 3415376384.

The previous prime is 12807661913. The next prime is 12807661927. The reversal of 12807661920 is 2916670821.

It is an interprime number because it is at equal distance from previous prime (12807661913) and next prime (12807661927).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12807661927) 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, 13340835 + ... + 13341794.

It is an arithmetic number, because the mean of its divisors is an integer number (840502845).

Almost surely, 2^12807661920 is an apocalyptic number.

12807661920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12807661920 is an abundant number, since it is smaller than the sum of its proper divisors (27536474640).

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

12807661920 is a wasteful number, since it uses less digits than its factorization.

12807661920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26682647 (or 26682639 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 12807661920 in words is "twelve billion, eight hundred seven million, six hundred sixty-one thousand, nine hundred twenty".