195312729798 has 24 divisors (see below), whose sum is σ = 423196347600. Its totient is φ = 65101356144.

The previous prime is 195312729761. The next prime is 195312729823. The reversal of 195312729798 is 897927213591.

195312729798 is a `hidden beast` number, since 1 + 9 + 531 + 2 + 7 + 2 + 9 + 7 + 98 = 666.

It is a super-2 number, since 2×195312729798² (a number of 23 digits) contains 22 as substring.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 198208 + ... + 655676.

It is an arithmetic number, because the mean of its divisors is an integer number (17633181150).

Almost surely, 2^195312729798 is an apocalyptic number.

195312729798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

195312729798 is an abundant number, since it is smaller than the sum of its proper divisors (227883617802).

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

195312729798 is a wasteful number, since it uses less digits than its factorization.

195312729798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481196 (or 481193 counting only the distinct ones).

The product of its digits is 17146080, while the sum is 63.

The spelling of 195312729798 in words is "one hundred ninety-five billion, three hundred twelve million, seven hundred twenty-nine thousand, seven hundred ninety-eight".