12939732780 has 96 divisors (see below), whose sum is σ = 39600793344. Its totient is φ = 3137612544.

The previous prime is 12939732769. The next prime is 12939732791. The reversal of 12939732780 is 8723793921.

It is an interprime number because it is at equal distance from previous prime (12939732769) and next prime (12939732791).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71542 + ... + 176061.

It is an arithmetic number, because the mean of its divisors is an integer number (412508264).

Almost surely, 2^12939732780 is an apocalyptic number.

12939732780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12939732780 is an abundant number, since it is smaller than the sum of its proper divisors (26661060564).

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

12939732780 is a wasteful number, since it uses less digits than its factorization.

12939732780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247695 (or 247693 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 51.

The spelling of 12939732780 in words is "twelve billion, nine hundred thirty-nine million, seven hundred thirty-two thousand, seven hundred eighty".