198437440437 has 32 divisors (see below), whose sum is σ = 296411381760. Its totient is φ = 131198946480.

The previous prime is 198437440403. The next prime is 198437440459. The reversal of 198437440437 is 734044734891.

It is a happy number.

198437440437 is a `hidden beast` number, since 198 + 4 + 3 + 7 + 440 + 4 + 3 + 7 = 666.

It is not a de Polignac number, because 198437440437 - 2⁷ = 198437440309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198437441437) 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, 10150362 + ... + 10169892.

It is an arithmetic number, because the mean of its divisors is an integer number (9262855680).

Almost surely, 2^198437440437 is an apocalyptic number.

It is an amenable number.

198437440437 is a deficient number, since it is larger than the sum of its proper divisors (97973941323).

198437440437 is a wasteful number, since it uses less digits than its factorization.

198437440437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22630 (or 22624 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 54.

The spelling of 198437440437 in words is "one hundred ninety-eight billion, four hundred thirty-seven million, four hundred forty thousand, four hundred thirty-seven".