205985772192 has 24 divisors (see below), whose sum is σ = 540712652256. Its totient is φ = 68661924032.

The previous prime is 205985772173. The next prime is 205985772247. The reversal of 205985772192 is 291277589502.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072842468 + ... + 1072842659.

It is an arithmetic number, because the mean of its divisors is an integer number (22529693844).

Almost surely, 2^205985772192 is an apocalyptic number.

It is an amenable number.

205985772192 is an abundant number, since it is smaller than the sum of its proper divisors (334726880064).

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

205985772192 is a wasteful number, since it uses less digits than its factorization.

205985772192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145685140 (or 2145685132 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 57.

The spelling of 205985772192 in words is "two hundred five billion, nine hundred eighty-five million, seven hundred seventy-two thousand, one hundred ninety-two".