195001081988 has 12 divisors (see below), whose sum is σ = 341284043520. Its totient is φ = 97491355272.

The previous prime is 195001081987. The next prime is 195001081993. The reversal of 195001081988 is 889180100591.

It is not an unprimeable number, because it can be changed into a prime (195001081987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2248556 + ... + 2333667.

It is an arithmetic number, because the mean of its divisors is an integer number (28440336960).

Almost surely, 2^195001081988 is an apocalyptic number.

It is an amenable number.

195001081988 is a deficient number, since it is larger than the sum of its proper divisors (146282961532).

195001081988 is a wasteful number, since it uses less digits than its factorization.

195001081988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4592866 (or 4592864 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 50.

The spelling of 195001081988 in words is "one hundred ninety-five billion, one million, eighty-one thousand, nine hundred eighty-eight".