205117996535 has 16 divisors (see below), whose sum is σ = 246545119200. Its totient is φ = 163825514496.

The previous prime is 205117996519. The next prime is 205117996547. The reversal of 205117996535 is 535699711502.

It is a cyclic number.

It is not a de Polignac number, because 205117996535 - 2⁴ = 205117996519 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19241927 + ... + 19252583.

It is an arithmetic number, because the mean of its divisors is an integer number (15409069950).

Almost surely, 2^205117996535 is an apocalyptic number.

205117996535 is a deficient number, since it is larger than the sum of its proper divisors (41427122665).

205117996535 is a wasteful number, since it uses less digits than its factorization.

205117996535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16610.

The product of its (nonzero) digits is 2551500, while the sum is 53.

The spelling of 205117996535 in words is "two hundred five billion, one hundred seventeen million, nine hundred ninety-six thousand, five hundred thirty-five".