12506736557 has 8 divisors (see below), whose sum is σ = 14339375232. Its totient is φ = 10685588400.

The previous prime is 12506736527. The next prime is 12506736601. The reversal of 12506736557 is 75563760521.

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 12506736557 - 2⁶ = 12506736493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12506736527) 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, 2870294 + ... + 2874647.

It is an arithmetic number, because the mean of its divisors is an integer number (1792421904).

Almost surely, 2^12506736557 is an apocalyptic number.

It is an amenable number.

12506736557 is a deficient number, since it is larger than the sum of its proper divisors (1832638675).

12506736557 is an equidigital number, since it uses as much as digits as its factorization.

12506736557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5745259.

The product of its (nonzero) digits is 1323000, while the sum is 47.

The spelling of 12506736557 in words is "twelve billion, five hundred six million, seven hundred thirty-six thousand, five hundred fifty-seven".