205161164 has 24 divisors (see below), whose sum is σ = 407001840. Its totient is φ = 89705664.

The previous prime is 205161161. The next prime is 205161179. The reversal of 205161164 is 461161502.

It is a super-2 number, since 2×205161164² = 84182206427669792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (205161161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102839 + ... + 104814.

It is an arithmetic number, because the mean of its divisors is an integer number (16958410).

Almost surely, 2^205161164 is an apocalyptic number.

It is an amenable number.

205161164 is a deficient number, since it is larger than the sum of its proper divisors (201840676).

205161164 is a wasteful number, since it uses less digits than its factorization.

205161164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207689 (or 207687 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 205161164 is about 14323.4480485671. The cubic root of 205161164 is about 589.7913309762.

The spelling of 205161164 in words is "two hundred five million, one hundred sixty-one thousand, one hundred sixty-four".