195641538 has 8 divisors (see below), whose sum is σ = 391283088. Its totient is φ = 65213844.

The previous prime is 195641483. The next prime is 195641561. The reversal of 195641538 is 835146591.

It is a sphenic number, since it is the product of 3 distinct primes.

195641538 is an admirable number.

It is a super-2 number, since 2×195641538² = 76551222782010888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 195641538.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16303456 + ... + 16303467.

It is an arithmetic number, because the mean of its divisors is an integer number (48910386).

Almost surely, 2^195641538 is an apocalyptic number.

195641538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

195641538 is a wasteful number, since it uses less digits than its factorization.

195641538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32606928.

The product of its digits is 129600, while the sum is 42.

The square root of 195641538 is about 13987.1919269023. The cubic root of 195641538 is about 580.5242366845.

The spelling of 195641538 in words is "one hundred ninety-five million, six hundred forty-one thousand, five hundred thirty-eight".