198737664 has 72 divisors (see below), whose sum is σ = 551978112. Its totient is φ = 63360000.

The previous prime is 198737659. The next prime is 198737689. The reversal of 198737664 is 466737891.

198737664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12039 + ... + 23289.

Almost surely, 2^198737664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198737664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275989056).

198737664 is an abundant number, since it is smaller than the sum of its proper divisors (353240448).

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

198737664 is a wasteful number, since it uses less digits than its factorization.

198737664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11293 (or 11279 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 51.

The square root of 198737664 is about 14097.4346602494. The cubic root of 198737664 is about 583.5705856871.

The spelling of 198737664 in words is "one hundred ninety-eight million, seven hundred thirty-seven thousand, six hundred sixty-four".