195905281836 has 72 divisors (see below), whose sum is σ = 532001478960. Its totient is φ = 55873157120.

The previous prime is 195905281811. The next prime is 195905281843. The reversal of 195905281836 is 638182509591.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3943581 + ... + 3992948.

It is an arithmetic number, because the mean of its divisors is an integer number (7388909430).

Almost surely, 2^195905281836 is an apocalyptic number.

It is an amenable number.

195905281836 is an abundant number, since it is smaller than the sum of its proper divisors (336096197124).

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

195905281836 is a wasteful number, since it uses less digits than its factorization.

195905281836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7936575 (or 7936562 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 57.

The spelling of 195905281836 in words is "one hundred ninety-five billion, nine hundred five million, two hundred eighty-one thousand, eight hundred thirty-six".