12561879498 has 16 divisors (see below), whose sum is σ = 28712867520. Its totient is φ = 3589108416.

The previous prime is 12561879467. The next prime is 12561879521. The reversal of 12561879498 is 89497816521.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149546143 + ... + 149546226.

It is an arithmetic number, because the mean of its divisors is an integer number (1794554220).

Almost surely, 2^12561879498 is an apocalyptic number.

12561879498 is an abundant number, since it is smaller than the sum of its proper divisors (16150988022).

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

12561879498 is a wasteful number, since it uses less digits than its factorization.

12561879498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299092381.

The product of its digits is 8709120, while the sum is 60.

The spelling of 12561879498 in words is "twelve billion, five hundred sixty-one million, eight hundred seventy-nine thousand, four hundred ninety-eight".