198512499999 has 16 divisors (see below), whose sum is σ = 289002628224. Its totient is φ = 120203450400.

The previous prime is 198512499973. The next prime is 198512500001. The reversal of 198512499999 is 999994215891.

198512499999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198512499999 - 2²³ = 198504111391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198512499999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198512499919) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2641272 + ... + 2715389.

It is an arithmetic number, because the mean of its divisors is an integer number (18062664264).

Almost surely, 2^198512499999 is an apocalyptic number.

198512499999 is a deficient number, since it is larger than the sum of its proper divisors (90490128225).

198512499999 is a wasteful number, since it uses less digits than its factorization.

198512499999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5357798.

The product of its digits is 170061120, while the sum is 75.

The spelling of 198512499999 in words is "one hundred ninety-eight billion, five hundred twelve million, four hundred ninety-nine thousand, nine hundred ninety-nine".