198307945905 has 32 divisors (see below), whose sum is σ = 319782293760. Its totient is φ = 104936083200.

The previous prime is 198307945883. The next prime is 198307945943. The reversal of 198307945905 is 509549703891.

It is not a de Polignac number, because 198307945905 - 2⁹ = 198307945393 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1824879 + ... + 1930491.

It is an arithmetic number, because the mean of its divisors is an integer number (9993196680).

Almost surely, 2^198307945905 is an apocalyptic number.

198307945905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198307945905 is a deficient number, since it is larger than the sum of its proper divisors (121474347855).

198307945905 is a wasteful number, since it uses less digits than its factorization.

198307945905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106601.

The product of its (nonzero) digits is 12247200, while the sum is 60.

The spelling of 198307945905 in words is "one hundred ninety-eight billion, three hundred seven million, nine hundred forty-five thousand, nine hundred five".