12511564998 has 32 divisors (see below), whose sum is σ = 25540894080. Its totient is φ = 4085104320.

The previous prime is 12511564997. The next prime is 12511565023. The reversal of 12511564998 is 89946511521.

It is a self number, because there is not a number n which added to its sum of digits gives 12511564998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12511564993) 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, 52348 + ... + 166623.

It is an arithmetic number, because the mean of its divisors is an integer number (798152940).

Almost surely, 2^12511564998 is an apocalyptic number.

12511564998 is an abundant number, since it is smaller than the sum of its proper divisors (13029329082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12511564998 is a wasteful number, since it uses less digits than its factorization.

12511564998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219172.

The product of its digits is 777600, while the sum is 51.

The spelling of 12511564998 in words is "twelve billion, five hundred eleven million, five hundred sixty-four thousand, nine hundred ninety-eight".