12999109658 has 16 divisors (see below), whose sum is σ = 20132160000. Its totient is φ = 6288483600.

The previous prime is 12999109639. The next prime is 12999109661. The reversal of 12999109658 is 85690199921.

It is a junction number, because it is equal to n+sod(n) for n = 12999109597 and 12999109606.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288968 + ... + 330908.

It is an arithmetic number, because the mean of its divisors is an integer number (1258260000).

Almost surely, 2^12999109658 is an apocalyptic number.

12999109658 is a deficient number, since it is larger than the sum of its proper divisors (7133050342).

12999109658 is a wasteful number, since it uses less digits than its factorization.

12999109658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46973.

The product of its (nonzero) digits is 3149280, while the sum is 59.

The spelling of 12999109658 in words is "twelve billion, nine hundred ninety-nine million, one hundred nine thousand, six hundred fifty-eight".