198165663649674 has 64 divisors (see below), whose sum is σ = 503552742727680. Its totient is φ = 56587838528880.

The previous prime is 198165663649643. The next prime is 198165663649687. The reversal of 198165663649674 is 476946366561891.

198165663649674 is a `hidden beast` number, since 1 + 9 + 8 + 1 + 6 + 56 + 6 + 3 + 6 + 496 + 74 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 198165663649593 and 198165663649602.

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, 142466754 + ... + 143850989.

It is an arithmetic number, because the mean of its divisors is an integer number (7868011605120).

Almost surely, 2^{198165663649674} is an apocalyptic number.

198165663649674 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

198165663649674 is an abundant number, since it is smaller than the sum of its proper divisors (305387079078006).

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

198165663649674 is a wasteful number, since it uses less digits than its factorization.

198165663649674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286319592 (or 286319586 counting only the distinct ones).

The product of its digits is 8465264640, while the sum is 81.

The spelling of 198165663649674 in words is "one hundred ninety-eight trillion, one hundred sixty-five billion, six hundred sixty-three million, six hundred forty-nine thousand, six hundred seventy-four".