12909958884 has 81 divisors (see below), whose sum is σ = 33849440443. Its totient is φ = 4148566464.

The previous prime is 12909958877. The next prime is 12909958889. The reversal of 12909958884 is 48885990921.

The square root of 12909958884 is 113622.

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

12909958884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 838102500 + 12071856384 = 28950^2 + 109872^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12909958889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 19769902 + ... + 19770554.

Almost surely, 2^12909958884 is an apocalyptic number.

12909958884 is the 113622-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12909958884

12909958884 is an abundant number, since it is smaller than the sum of its proper divisors (20939481559).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12909958884 is an equidigital number, since it uses as much as digits as its factorization.

12909958884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 63.

The spelling of 12909958884 in words is "twelve billion, nine hundred nine million, nine hundred fifty-eight thousand, eight hundred eighty-four".