12631146445 has 4 divisors (see below), whose sum is σ = 15157375740. Its totient is φ = 10104917152.

The previous prime is 12631146427. The next prime is 12631146461. The reversal of 12631146445 is 54464113621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54464113621 = 31 ⋅1756906891.

It can be written as a sum of positive squares in 2 ways, for example, as 9840243204 + 2790903241 = 99198^2 + 52829^2 .

It is a cyclic number.

It is not a de Polignac number, because 12631146445 - 2²³ = 12622757837 is a prime.

It is a super-2 number, since 2×12631146445² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1263114640 + ... + 1263114649.

It is an arithmetic number, because the mean of its divisors is an integer number (3789343935).

Almost surely, 2^12631146445 is an apocalyptic number.

It is an amenable number.

12631146445 is a deficient number, since it is larger than the sum of its proper divisors (2526229295).

12631146445 is an equidigital number, since it uses as much as digits as its factorization.

12631146445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526229294.

The product of its digits is 69120, while the sum is 37.

The spelling of 12631146445 in words is "twelve billion, six hundred thirty-one million, one hundred forty-six thousand, four hundred forty-five".