12746635801 has 3 divisors (see below), whose sum is σ = 12746748703. Its totient is φ = 12746522900.

The previous prime is 12746635793. The next prime is 12746635807. The reversal of 12746635801 is 10853664721.

The square root of 12746635801 is 112901.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 12443179401 + 303456400 = 111549^2 + 17420^2 .

It is not a de Polignac number, because 12746635801 - 2³ = 12746635793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12746635807) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 56451 + ... + 169351.

Almost surely, 2^12746635801 is an apocalyptic number.

12746635801 is the 112901-st square number.

12746635801 is the 56451-st centered octagonal number.

It is an amenable number.

12746635801 is a deficient number, since it is larger than the sum of its proper divisors (112902).

12746635801 is an frugal number, since it uses more digits than its factorization.

12746635801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225802 (or 112901 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 12746635801 in words is "twelve billion, seven hundred forty-six million, six hundred thirty-five thousand, eight hundred one".