12658775997 has 16 divisors (see below), whose sum is σ = 19810904192. Its totient is φ = 7038083520.

The previous prime is 12658775963. The next prime is 12658775999. The reversal of 12658775997 is 79957785621.

It is a happy number.

It is not a de Polignac number, because 12658775997 - 2⁷ = 12658775869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12658775999) 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, 8145154 + ... + 8146707.

It is an arithmetic number, because the mean of its divisors is an integer number (1238181512).

Almost surely, 2^12658775997 is an apocalyptic number.

It is an amenable number.

12658775997 is a deficient number, since it is larger than the sum of its proper divisors (7152128195).

12658775997 is a wasteful number, since it uses less digits than its factorization.

12658775997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16291908.

The product of its digits is 66679200, while the sum is 66.

The spelling of 12658775997 in words is "twelve billion, six hundred fifty-eight million, seven hundred seventy-five thousand, nine hundred ninety-seven".