16198690774865 has 16 divisors (see below), whose sum is σ = 20289979094400. Its totient is φ = 12391608125952.

The previous prime is 16198690774813. The next prime is 16198690774867. The reversal of 16198690774865 is 56847709689161.

It is a cyclic number.

It is not a de Polignac number, because 16198690774865 - 2¹⁰ = 16198690773841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16198690774867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21859955 + ... + 22588824.

It is an arithmetic number, because the mean of its divisors is an integer number (1268123693400).

Almost surely, 2^{16198690774865} is an apocalyptic number.

It is an amenable number.

16198690774865 is a deficient number, since it is larger than the sum of its proper divisors (4091288319535).

16198690774865 is a wasteful number, since it uses less digits than its factorization.

16198690774865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44451976.

The product of its (nonzero) digits is 1097349120, while the sum is 77.

The spelling of 16198690774865 in words is "sixteen trillion, one hundred ninety-eight billion, six hundred ninety million, seven hundred seventy-four thousand, eight hundred sixty-five".