198770404968 has 24 divisors (see below), whose sum is σ = 538336513650. Its totient is φ = 66256801632.

The previous prime is 198770404879. The next prime is 198770405027. The reversal of 198770404968 is 869404077891.

It can be written as a sum of positive squares in only one way, i.e., 141179044644 + 57591360324 = 375738^2 + 239982^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×198770404968² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1380349963 + ... + 1380350106.

Almost surely, 2^198770404968 is an apocalyptic number.

198770404968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

198770404968 is an abundant number, since it is smaller than the sum of its proper divisors (339566108682).

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

198770404968 is a wasteful number, since it uses less digits than its factorization.

198770404968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760700081 (or 2760700074 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The spelling of 198770404968 in words is "one hundred ninety-eight billion, seven hundred seventy million, four hundred four thousand, nine hundred sixty-eight".