198437440436 has 12 divisors (see below), whose sum is σ = 358467634560. Its totient is φ = 96018116280.

The previous prime is 198437440403. The next prime is 198437440459. The reversal of 198437440436 is 634044734891.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800150846 + ... + 800151093.

It is an arithmetic number, because the mean of its divisors is an integer number (29872302880).

Almost surely, 2^198437440436 is an apocalyptic number.

It is an amenable number.

198437440436 is a deficient number, since it is larger than the sum of its proper divisors (160030194124).

198437440436 is a wasteful number, since it uses less digits than its factorization.

198437440436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600301974 (or 1600301972 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 53.

The spelling of 198437440436 in words is "one hundred ninety-eight billion, four hundred thirty-seven million, four hundred forty thousand, four hundred thirty-six".