198425293557 has 32 divisors (see below), whose sum is σ = 279332121600. Its totient is φ = 124943461632.

The previous prime is 198425293523. The next prime is 198425293607. The reversal of 198425293557 is 755392524891.

It is not a de Polignac number, because 198425293557 - 2²⁶ = 198358184693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198425293557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198425293457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65723994 + ... + 65727012.

It is an arithmetic number, because the mean of its divisors is an integer number (8729128800).

Almost surely, 2^198425293557 is an apocalyptic number.

It is an amenable number.

198425293557 is a deficient number, since it is larger than the sum of its proper divisors (80906828043).

198425293557 is a wasteful number, since it uses less digits than its factorization.

198425293557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6137.

The product of its digits is 27216000, while the sum is 60.

The spelling of 198425293557 in words is "one hundred ninety-eight billion, four hundred twenty-five million, two hundred ninety-three thousand, five hundred fifty-seven".