12631462661 has 4 divisors (see below), whose sum is σ = 12633487692. Its totient is φ = 12629437632.

The previous prime is 12631462643. The next prime is 12631462663. The reversal of 12631462661 is 16626413621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9853540225 + 2777922436 = 99265^2 + 52706^2 .

It is a cyclic number.

It is not a de Polignac number, because 12631462661 - 2²⁶ = 12564353797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12631462663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1003130 + ... + 1015643.

It is an arithmetic number, because the mean of its divisors is an integer number (3158371923).

Almost surely, 2^12631462661 is an apocalyptic number.

It is an amenable number.

12631462661 is a deficient number, since it is larger than the sum of its proper divisors (2025031).

12631462661 is an equidigital number, since it uses as much as digits as its factorization.

12631462661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025030.

The product of its digits is 62208, while the sum is 38.

The spelling of 12631462661 in words is "twelve billion, six hundred thirty-one million, four hundred sixty-two thousand, six hundred sixty-one".