12642887718165 has 32 divisors (see below), whose sum is σ = 21153715752960. Its totient is φ = 6435774709056.

The previous prime is 12642887718151. The next prime is 12642887718191. The reversal of 12642887718165 is 56181778824621.

It is not a de Polignac number, because 12642887718165 - 2⁷ = 12642887718037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12642887718096 and 12642887718105.

It is a congruent number.

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, 39414835 + ... + 39734304.

It is an arithmetic number, because the mean of its divisors is an integer number (661053617280).

Almost surely, 2^{12642887718165} is an apocalyptic number.

12642887718165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12642887718165 is a deficient number, since it is larger than the sum of its proper divisors (8510828034795).

12642887718165 is a wasteful number, since it uses less digits than its factorization.

12642887718165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79149633.

The product of its digits is 72253440, while the sum is 66.

The spelling of 12642887718165 in words is "twelve trillion, six hundred forty-two billion, eight hundred eighty-seven million, seven hundred eighteen thousand, one hundred sixty-five".