12911894643 has 8 divisors (see below), whose sum is σ = 17277127056. Its totient is φ = 8577296000.

The previous prime is 12911894603. The next prime is 12911894647. The reversal of 12911894643 is 34649811921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12911894643 - 2⁹ = 12911894131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12911894592 and 12911894601.

It is not an unprimeable number, because it can be changed into a prime (12911894647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7657458 + ... + 7659143.

It is an arithmetic number, because the mean of its divisors is an integer number (2159640882).

Almost surely, 2^12911894643 is an apocalyptic number.

12911894643 is a deficient number, since it is larger than the sum of its proper divisors (4365232413).

12911894643 is a wasteful number, since it uses less digits than its factorization.

12911894643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15316885.

The product of its digits is 373248, while the sum is 48.

The spelling of 12911894643 in words is "twelve billion, nine hundred eleven million, eight hundred ninety-four thousand, six hundred forty-three".