12643437156045 has 16 divisors (see below), whose sum is σ = 20230391986560. Its totient is φ = 6742868970944.

The previous prime is 12643437156043. The next prime is 12643437156059. The reversal of 12643437156045 is 54065173434621.

It is a cyclic number.

It is not a de Polignac number, because 12643437156045 - 2¹ = 12643437156043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643437156043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18242994 + ... + 18923363.

It is an arithmetic number, because the mean of its divisors is an integer number (1264399499160).

Almost surely, 2^{12643437156045} is an apocalyptic number.

12643437156045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12643437156045 is a deficient number, since it is larger than the sum of its proper divisors (7586954830515).

12643437156045 is a wasteful number, since it uses less digits than its factorization.

12643437156045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37189044.

The product of its (nonzero) digits is 7257600, while the sum is 51.

The spelling of 12643437156045 in words is "twelve trillion, six hundred forty-three billion, four hundred thirty-seven million, one hundred fifty-six thousand, forty-five".