195489405912 has 32 divisors (see below), whose sum is σ = 490857692400. Its totient is φ = 64878578304.

The previous prime is 195489405907. The next prime is 195489405929. The reversal of 195489405912 is 219504984591.

It is a super-2 number, since 2×195489405912² (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 7 ways as a sum of consecutive naturals, for example, 17779203 + ... + 17790194.

Almost surely, 2^195489405912 is an apocalyptic number.

195489405912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

195489405912 is an abundant number, since it is smaller than the sum of its proper divisors (295368286488).

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

195489405912 is a wasteful number, since it uses less digits than its factorization.

195489405912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35569635 (or 35569631 counting only the distinct ones).

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

The spelling of 195489405912 in words is "one hundred ninety-five billion, four hundred eighty-nine million, four hundred five thousand, nine hundred twelve".