205797075081 has 16 divisors (see below), whose sum is σ = 296110303104. Its totient is φ = 126384292224.

The previous prime is 205797075073. The next prime is 205797075119. The reversal of 205797075081 is 180570797502.

It is not a de Polignac number, because 205797075081 - 2³ = 205797075073 is a prime.

It is a super-2 number, since 2×205797075081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205797075031) 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, 5398716 + ... + 5436701.

It is an arithmetic number, because the mean of its divisors is an integer number (18506893944).

Almost surely, 2^205797075081 is an apocalyptic number.

It is an amenable number.

205797075081 is a deficient number, since it is larger than the sum of its proper divisors (90313228023).

205797075081 is a wasteful number, since it uses less digits than its factorization.

205797075081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10835920.

The product of its (nonzero) digits is 1234800, while the sum is 51.

The spelling of 205797075081 in words is "two hundred five billion, seven hundred ninety-seven million, seventy-five thousand, eighty-one".