12908637653 has 8 divisors (see below), whose sum is σ = 13175022168. Its totient is φ = 12643098624.

The previous prime is 12908637649. The next prime is 12908637733. The reversal of 12908637653 is 35673680921.

It can be written as a sum of positive squares in 4 ways, for example, as 11021430289 + 1887207364 = 104983^2 + 43442^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12908637653 - 2² = 12908637649 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 (12908637253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180476 + ... + 241637.

It is an arithmetic number, because the mean of its divisors is an integer number (1646877771).

Almost surely, 2^12908637653 is an apocalyptic number.

It is an amenable number.

12908637653 is a deficient number, since it is larger than the sum of its proper divisors (266384515).

12908637653 is an equidigital number, since it uses as much as digits as its factorization.

12908637653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422743.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 12908637653 in words is "twelve billion, nine hundred eight million, six hundred thirty-seven thousand, six hundred fifty-three".