12945693405 has 16 divisors (see below), whose sum is σ = 21613680000. Its totient is φ = 6604179648.

The previous prime is 12945693353. The next prime is 12945693407. The reversal of 12945693405 is 50439654921.

It is not a de Polignac number, because 12945693405 - 2¹⁰ = 12945692381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12945693407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18761530 + ... + 18762219.

It is an arithmetic number, because the mean of its divisors is an integer number (1350855000).

Almost surely, 2^12945693405 is an apocalyptic number.

12945693405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12945693405 is a deficient number, since it is larger than the sum of its proper divisors (8667986595).

12945693405 is a wasteful number, since it uses less digits than its factorization.

12945693405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37523780.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 12945693405 in words is "twelve billion, nine hundred forty-five million, six hundred ninety-three thousand, four hundred five".