12898990805 has 32 divisors (see below), whose sum is σ = 16819488000. Its totient is φ = 9459919872.

The previous prime is 12898990777. The next prime is 12898990831. The reversal of 12898990805 is 50809989821.

It is a cyclic number.

It is not a de Polignac number, because 12898990805 - 2¹⁴ = 12898974421 is a prime.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 615896 + ... + 636494.

It is an arithmetic number, because the mean of its divisors is an integer number (525609000).

Almost surely, 2^12898990805 is an apocalyptic number.

It is an amenable number.

12898990805 is a deficient number, since it is larger than the sum of its proper divisors (3920497195).

12898990805 is a wasteful number, since it uses less digits than its factorization.

12898990805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20813.

The product of its (nonzero) digits is 3732480, while the sum is 59.

The spelling of 12898990805 in words is "twelve billion, eight hundred ninety-eight million, nine hundred ninety thousand, eight hundred five".