12645313023544 has 8 divisors (see below), whose sum is σ = 23709961919160. Its totient is φ = 6322656511768.

The previous prime is 12645313023527. The next prime is 12645313023557. The reversal of 12645313023544 is 44532031354621.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×12645313023544² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12645313023544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 790332063964 + ... + 790332063979.

It is an arithmetic number, because the mean of its divisors is an integer number (2963745239895).

Almost surely, 2^{12645313023544} is an apocalyptic number.

It is an amenable number.

12645313023544 is a deficient number, since it is larger than the sum of its proper divisors (11064648895616).

12645313023544 is a wasteful number, since it uses less digits than its factorization.

12645313023544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580664127949 (or 1580664127945 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 12645313023544 in words is "twelve trillion, six hundred forty-five billion, three hundred thirteen million, twenty-three thousand, five hundred forty-four".