12645539191958 has 16 divisors (see below), whose sum is σ = 19215873051840. Its totient is φ = 6240503265216.

The previous prime is 12645539191933. The next prime is 12645539191963. The reversal of 12645539191958 is 85919193554621.

It is a super-3 number, since 3×12645539191958³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

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, 63673166 + ... + 63871457.

It is an arithmetic number, because the mean of its divisors is an integer number (1200992065740).

Almost surely, 2^{12645539191958} is an apocalyptic number.

12645539191958 is a deficient number, since it is larger than the sum of its proper divisors (6570333859882).

12645539191958 is a wasteful number, since it uses less digits than its factorization.

12645539191958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127545271.

The product of its digits is 104976000, while the sum is 68.

The spelling of 12645539191958 in words is "twelve trillion, six hundred forty-five billion, five hundred thirty-nine million, one hundred ninety-one thousand, nine hundred fifty-eight".