195911017816 has 32 divisors (see below), whose sum is σ = 375305711040. Its totient is φ = 95831239168.

The previous prime is 195911017759. The next prime is 195911017859. The reversal of 195911017816 is 618710119591.

It is a super-2 number, since 2×195911017816² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 195911017816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 801006 + ... + 1016578.

It is an arithmetic number, because the mean of its divisors is an integer number (11728303470).

Almost surely, 2^195911017816 is an apocalyptic number.

It is an amenable number.

195911017816 is a deficient number, since it is larger than the sum of its proper divisors (179394693224).

195911017816 is a wasteful number, since it uses less digits than its factorization.

195911017816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218043 (or 218039 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 49.

The spelling of 195911017816 in words is "one hundred ninety-five billion, nine hundred eleven million, seventeen thousand, eight hundred sixteen".