198679895507 has 4 divisors (see below), whose sum is σ = 199720104576. Its totient is φ = 197639686440.

The previous prime is 198679895501. The next prime is 198679895527. The reversal of 198679895507 is 705598976891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 705598976891 = 421 ⋅1676007071.

It is a cyclic number.

It is not a de Polignac number, because 198679895507 - 2⁶ = 198679895443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198679895501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520104248 + ... + 520104629.

It is an arithmetic number, because the mean of its divisors is an integer number (49930026144).

Almost surely, 2^198679895507 is an apocalyptic number.

198679895507 is a deficient number, since it is larger than the sum of its proper divisors (1040209069).

198679895507 is a wasteful number, since it uses less digits than its factorization.

198679895507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040209068.

The product of its (nonzero) digits is 342921600, while the sum is 74.

The spelling of 198679895507 in words is "one hundred ninety-eight billion, six hundred seventy-nine million, eight hundred ninety-five thousand, five hundred seven".