205581380795 has 128 divisors (see below), whose sum is σ = 304975134720. Its totient is φ = 130069463040.

The previous prime is 205581380791. The next prime is 205581380891. The reversal of 205581380795 is 597083185502.

It is not a de Polignac number, because 205581380795 - 2² = 205581380791 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205581380791) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 582383339 + ... + 582383691.

It is an arithmetic number, because the mean of its divisors is an integer number (2382618240).

Almost surely, 2^205581380795 is an apocalyptic number.

205581380795 is a deficient number, since it is larger than the sum of its proper divisors (99393753925).

205581380795 is a wasteful number, since it uses less digits than its factorization.

205581380795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685.

The product of its (nonzero) digits is 3024000, while the sum is 53.

The spelling of 205581380795 in words is "two hundred five billion, five hundred eighty-one million, three hundred eighty thousand, seven hundred ninety-five".