12635294173 has 2 divisors, whose sum is σ = 12635294174. Its totient is φ = 12635294172.

The previous prime is 12635294159. The next prime is 12635294197. The reversal of 12635294173 is 37149253621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11281201369 + 1354092804 = 106213^2 + 36798^2 .

It is a cyclic number.

It is not a de Polignac number, because 12635294173 - 2⁵ = 12635294141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12635294473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6317647086 + 6317647087.

It is an arithmetic number, because the mean of its divisors is an integer number (6317647087).

Almost surely, 2^12635294173 is an apocalyptic number.

It is an amenable number.

12635294173 is a deficient number, since it is larger than the sum of its proper divisors (1).

12635294173 is an equidigital number, since it uses as much as digits as its factorization.

12635294173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 43.

The spelling of 12635294173 in words is "twelve billion, six hundred thirty-five million, two hundred ninety-four thousand, one hundred seventy-three".