195861435805 has 16 divisors (see below), whose sum is σ = 271846237824. Its totient is φ = 132686850240.

The previous prime is 195861435787. The next prime is 195861435811. The reversal of 195861435805 is 508534168591.

It is not a de Polignac number, because 195861435805 - 2¹³ = 195861427613 is a prime.

It is a super-2 number, since 2×195861435805² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33708186 + ... + 33713995.

It is an arithmetic number, because the mean of its divisors is an integer number (16990389864).

Almost surely, 2^195861435805 is an apocalyptic number.

It is an amenable number.

195861435805 is a deficient number, since it is larger than the sum of its proper divisors (75984802019).

195861435805 is an equidigital number, since it uses as much as digits as its factorization.

195861435805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67422276.

The product of its (nonzero) digits is 5184000, while the sum is 55.

The spelling of 195861435805 in words is "one hundred ninety-five billion, eight hundred sixty-one million, four hundred thirty-five thousand, eight hundred five".