198640896456 has 64 divisors (see below), whose sum is σ = 522793324800. Its totient is φ = 62722209600.

The previous prime is 198640896409. The next prime is 198640896511. The reversal of 198640896456 is 654698046891.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6373471 + ... + 6404561.

It is an arithmetic number, because the mean of its divisors is an integer number (8168645700).

Almost surely, 2^198640896456 is an apocalyptic number.

It is an amenable number.

198640896456 is an abundant number, since it is smaller than the sum of its proper divisors (324152428344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198640896456 is a wasteful number, since it uses less digits than its factorization.

198640896456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45130 (or 45126 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 66.

The spelling of 198640896456 in words is "one hundred ninety-eight billion, six hundred forty million, eight hundred ninety-six thousand, four hundred fifty-six".