198959135007 has 4 divisors (see below), whose sum is σ = 265278846680. Its totient is φ = 132639423336.

The previous prime is 198959134981. The next prime is 198959135017. The reversal of 198959135007 is 700531959891.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 198959135007 - 2¹⁰ = 198959133983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198959135017) 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, 33159855832 + ... + 33159855837.

It is an arithmetic number, because the mean of its divisors is an integer number (66319711670).

Almost surely, 2^198959135007 is an apocalyptic number.

198959135007 is a deficient number, since it is larger than the sum of its proper divisors (66319711673).

198959135007 is an equidigital number, since it uses as much as digits as its factorization.

198959135007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66319711672.

The product of its (nonzero) digits is 3061800, while the sum is 57.

The spelling of 198959135007 in words is "one hundred ninety-eight billion, nine hundred fifty-nine million, one hundred thirty-five thousand, seven".