12745598641 has 4 divisors (see below), whose sum is σ = 12770062884. Its totient is φ = 12721134400.

The previous prime is 12745598623. The next prime is 12745598647. The reversal of 12745598641 is 14689554721.

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 1227801600 + 11517797041 = 35040^2 + 107321^2 .

It is a cyclic number.

It is not a de Polignac number, because 12745598641 - 2¹⁷ = 12745467569 is a prime.

It is a super-2 number, since 2×12745598641² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12745598647) 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, 12231340 + ... + 12232381.

It is an arithmetic number, because the mean of its divisors is an integer number (3192515721).

Almost surely, 2^12745598641 is an apocalyptic number.

It is an amenable number.

12745598641 is a deficient number, since it is larger than the sum of its proper divisors (24464243).

12745598641 is an equidigital number, since it uses as much as digits as its factorization.

12745598641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24464242.

The product of its digits is 2419200, while the sum is 52.

The spelling of 12745598641 in words is "twelve billion, seven hundred forty-five million, five hundred ninety-eight thousand, six hundred forty-one".