12132615780 has 84 divisors (see below), whose sum is σ = 38200310652. Its totient is φ = 3235360320.

The previous prime is 12132615749. The next prime is 12132615871. The reversal of 12132615780 is 8751623121.

12132615780 is a `hidden beast` number, since 1 + 2 + 1 + 32 + 615 + 7 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2726719524 + 9405896256 = 52218^2 + 96984^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 401491 + ... + 430650.

It is an arithmetic number, because the mean of its divisors is an integer number (454765603).

Almost surely, 2^12132615780 is an apocalyptic number.

12132615780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12132615780 is an abundant number, since it is smaller than the sum of its proper divisors (26067694872).

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

12132615780 is an equidigital number, since it uses as much as digits as its factorization.

12132615780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832168 (or 832151 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 12132615780 in words is "twelve billion, one hundred thirty-two million, six hundred fifteen thousand, seven hundred eighty".