12912458689 has 9 divisors (see below), whose sum is σ = 13983729609. Its totient is φ = 11917829040.

The previous prime is 12912458677. The next prime is 12912458693. The reversal of 12912458689 is 98685421921.

The square root of 12912458689 is 113633.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5790449025 + 7122009664 = 76095^2 + 84392^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12912458689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12912458189) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1472859 + ... + 1481599.

Almost surely, 2^12912458689 is an apocalyptic number.

12912458689 is the 113633-rd square number.

12912458689 is the 56817-th centered octagonal number.

It is an amenable number.

12912458689 is a deficient number, since it is larger than the sum of its proper divisors (1071270920).

12912458689 is an frugal number, since it uses more digits than its factorization.

12912458689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17508 (or 8754 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 55.

The spelling of 12912458689 in words is "twelve billion, nine hundred twelve million, four hundred fifty-eight thousand, six hundred eighty-nine".