198769638239 has 8 divisors (see below), whose sum is σ = 201129252480. Its totient is φ = 196418289816.

The previous prime is 198769638229. The next prime is 198769638247. The reversal of 198769638239 is 932836967891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198769638239 - 2²⁴ = 198752861023 is a prime.

It is a super-2 number, since 2×198769638239² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198769638229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2018069 + ... + 2114270.

It is an arithmetic number, because the mean of its divisors is an integer number (25141156560).

Almost surely, 2^198769638239 is an apocalyptic number.

198769638239 is a deficient number, since it is larger than the sum of its proper divisors (2359614241).

198769638239 is a wasteful number, since it uses less digits than its factorization.

198769638239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4132909.

The product of its digits is 211631616, while the sum is 71.

The spelling of 198769638239 in words is "one hundred ninety-eight billion, seven hundred sixty-nine million, six hundred thirty-eight thousand, two hundred thirty-nine".