204690652817 has 16 divisors (see below), whose sum is σ = 246564829440. Its totient is φ = 166202941632.

The previous prime is 204690652813. The next prime is 204690652819. The reversal of 204690652817 is 718256096402.

It is not a de Polignac number, because 204690652817 - 2² = 204690652813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204690652813) 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, 9501773 + ... + 9523290.

It is an arithmetic number, because the mean of its divisors is an integer number (15410301840).

Almost surely, 2^204690652817 is an apocalyptic number.

It is an amenable number.

204690652817 is a deficient number, since it is larger than the sum of its proper divisors (41874176623).

204690652817 is a wasteful number, since it uses less digits than its factorization.

204690652817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19025152.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 204690652817 in words is "two hundred four billion, six hundred ninety million, six hundred fifty-two thousand, eight hundred seventeen".