12957951889 has 9 divisors (see below), whose sum is σ = 13161987657. Its totient is φ = 12757036644.

The previous prime is 12957951863. The next prime is 12957951893. The reversal of 12957951889 is 98815975921.

The square root of 12957951889 is 113833.

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

It is not a de Polignac number, because 12957951889 - 2¹¹ = 12957949841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12957951889.

It is not an unprimeable number, because it can be changed into a prime (12957951829) 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, 7625962 + ... + 7627660.

It is an arithmetic number, because the mean of its divisors is an integer number (1462443073).

Almost surely, 2^12957951889 is an apocalyptic number.

12957951889 is the 113833-rd square number.

12957951889 is the 56917-th centered octagonal number.

It is an amenable number.

12957951889 is a deficient number, since it is larger than the sum of its proper divisors (204035768).

12957951889 is an frugal number, since it uses more digits than its factorization.

12957951889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3532 (or 1766 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 64.

Multiplying 12957951889 by its sum of digits (64), we get a square (829308920896 = 910664²).

The spelling of 12957951889 in words is "twelve billion, nine hundred fifty-seven million, nine hundred fifty-one thousand, eight hundred eighty-nine".