195566958 has 12 divisors (see below), whose sum is σ = 423728448. Its totient is φ = 65188980.

The previous prime is 195566957. The next prime is 195566971. The reversal of 195566958 is 859665591.

It is a super-2 number, since 2×195566958² = 76492870122747528, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195566951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5432398 + ... + 5432433.

It is an arithmetic number, because the mean of its divisors is an integer number (35310704).

Almost surely, 2^195566958 is an apocalyptic number.

195566958 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

195566958 is an abundant number, since it is smaller than the sum of its proper divisors (228161490).

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

195566958 is a wasteful number, since it uses less digits than its factorization.

195566958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10864839 (or 10864836 counting only the distinct ones).

The product of its digits is 2916000, while the sum is 54.

The square root of 195566958 is about 13984.5256623169. The cubic root of 195566958 is about 580.4504605994.

The spelling of 195566958 in words is "one hundred ninety-five million, five hundred sixty-six thousand, nine hundred fifty-eight".