12499999998 has 32 divisors (see below), whose sum is σ = 25387333632. Its totient is φ = 4102274400.

The previous prime is 12499999951. The next prime is 12499999999. The reversal of 12499999998 is 89999999421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12499999999) 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, 292243 + ... + 332273.

It is an arithmetic number, because the mean of its divisors is an integer number (793354176).

Almost surely, 2^12499999998 is an apocalyptic number.

12499999998 is an abundant number, since it is smaller than the sum of its proper divisors (12887333634).

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

12499999998 is a wasteful number, since it uses less digits than its factorization.

12499999998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40840.

The product of its digits is 306110016, while the sum is 78.

The spelling of 12499999998 in words is "twelve billion, four hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".