198703760644 has 27 divisors (see below), whose sum is σ = 351180374727. Its totient is φ = 98376107304.

The previous prime is 198703760621. The next prime is 198703760663. The reversal of 198703760644 is 446067307891.

The square root of 198703760644 is 445762.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 95392027 + ... + 95394109.

Almost surely, 2^198703760644 is an apocalyptic number.

198703760644 is the 445762-nd square number.

It is an amenable number.

198703760644 is a deficient number, since it is larger than the sum of its proper divisors (152476614083).

198703760644 is an frugal number, since it uses more digits than its factorization.

198703760644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4384 (or 2192 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 198703760644 in words is "one hundred ninety-eight billion, seven hundred three million, seven hundred sixty thousand, six hundred forty-four".