12556898237 has 6 divisors (see below), whose sum is σ = 13597114842. Its totient is φ = 11590982832.

The previous prime is 12556898213. The next prime is 12556898261. The reversal of 12556898237 is 73289865521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12556898213) and next prime (12556898261).

It can be written as a sum of positive squares in 3 ways, for example, as 1695298276 + 10861599961 = 41174^2 + 104219^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12556898237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12556898287) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37150418 + ... + 37150755.

It is an arithmetic number, because the mean of its divisors is an integer number (2266185807).

Almost surely, 2^12556898237 is an apocalyptic number.

It is an amenable number.

12556898237 is a deficient number, since it is larger than the sum of its proper divisors (1040216605).

12556898237 is an equidigital number, since it uses as much as digits as its factorization.

12556898237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74301199 (or 74301186 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 56.

The spelling of 12556898237 in words is "twelve billion, five hundred fifty-six million, eight hundred ninety-eight thousand, two hundred thirty-seven".