2145645344631 has 16 divisors (see below), whose sum is σ = 3068251539840. Its totient is φ = 1329575663520.

The previous prime is 2145645344627. The next prime is 2145645344681. The reversal of 2145645344631 is 1364435465412.

It is not a de Polignac number, because 2145645344631 - 2² = 2145645344627 is a prime.

It is a super-2 number, since 2×2145645344631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145645344681) 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, 355118685 + ... + 355124726.

It is an arithmetic number, because the mean of its divisors is an integer number (191765721240).

Almost surely, 2^{2145645344631} is an apocalyptic number.

2145645344631 is a deficient number, since it is larger than the sum of its proper divisors (922606195209).

2145645344631 is a wasteful number, since it uses less digits than its factorization.

2145645344631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710243486.

The product of its digits is 4147200, while the sum is 48.

The spelling of 2145645344631 in words is "two trillion, one hundred forty-five billion, six hundred forty-five million, three hundred forty-four thousand, six hundred thirty-one".