12501563197 has 2 divisors, whose sum is σ = 12501563198. Its totient is φ = 12501563196.

The previous prime is 12501563167. The next prime is 12501563231. The reversal of 12501563197 is 79136510521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11753595396 + 747967801 = 108414^2 + 27349^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12501563197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12501563147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6250781598 + 6250781599.

It is an arithmetic number, because the mean of its divisors is an integer number (6250781599).

Almost surely, 2^12501563197 is an apocalyptic number.

It is an amenable number.

12501563197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12501563197 is an equidigital number, since it uses as much as digits as its factorization.

12501563197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 40.

The spelling of 12501563197 in words is "twelve billion, five hundred one million, five hundred sixty-three thousand, one hundred ninety-seven".