12913723408 has 20 divisors (see below), whose sum is σ = 25030233900. Its totient is φ = 6454308224.

The previous prime is 12913723367. The next prime is 12913723409. The reversal of 12913723408 is 80432731921.

It can be written as a sum of positive squares in 2 ways, for example, as 9290646544 + 3623076864 = 96388^2 + 60192^2 .

It is not an unprimeable number, because it can be changed into a prime (12913723409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117535 + ... + 199102.

It is an arithmetic number, because the mean of its divisors is an integer number (1251511695).

Almost surely, 2^12913723408 is an apocalyptic number.

It is an amenable number.

12913723408 is a deficient number, since it is larger than the sum of its proper divisors (12116510492).

12913723408 is a wasteful number, since it uses less digits than its factorization.

12913723408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319194 (or 319188 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 12913723408 in words is "twelve billion, nine hundred thirteen million, seven hundred twenty-three thousand, four hundred eight".