12646071655745 has 64 divisors (see below), whose sum is σ = 18440452742400. Its totient is φ = 8215991132160.

The previous prime is 12646071655697. The next prime is 12646071655769. The reversal of 12646071655745 is 54755617064621.

It is a happy number.

It is not a de Polignac number, because 12646071655745 - 2¹⁴ = 12646071639361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2352644 + ... + 5552213.

It is an arithmetic number, because the mean of its divisors is an integer number (288132074100).

Almost surely, 2^{12646071655745} is an apocalyptic number.

It is an amenable number.

12646071655745 is a deficient number, since it is larger than the sum of its proper divisors (5794381086655).

12646071655745 is a wasteful number, since it uses less digits than its factorization.

12646071655745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7904978.

The product of its (nonzero) digits is 42336000, while the sum is 59.

The spelling of 12646071655745 in words is "twelve trillion, six hundred forty-six billion, seventy-one million, six hundred fifty-five thousand, seven hundred forty-five".