198718815370 has 16 divisors (see below), whose sum is σ = 357822723528. Its totient is φ = 79458891520.

The previous prime is 198718815353. The next prime is 198718815403. The reversal of 198718815370 is 73518817891.

It can be written as a sum of positive squares in 4 ways, for example, as 184888820169 + 13829995201 = 429987^2 + 117601^2 .

It is a super-2 number, since 2×198718815370² (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 7 ways as a sum of consecutive naturals, for example, 3550171 + ... + 3605710.

Almost surely, 2^198718815370 is an apocalyptic number.

198718815370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198718815370 is a deficient number, since it is larger than the sum of its proper divisors (159103908158).

198718815370 is a wasteful number, since it uses less digits than its factorization.

198718815370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7158665.

The product of its (nonzero) digits is 3386880, while the sum is 58.

The spelling of 198718815370 in words is "one hundred ninety-eight billion, seven hundred eighteen million, eight hundred fifteen thousand, three hundred seventy".