195973978847 has 8 divisors (see below), whose sum is σ = 197427516000. Its totient is φ = 194522285664.

The previous prime is 195973978831. The next prime is 195973978877. The reversal of 195973978847 is 748879379591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195973978847 - 2⁴ = 195973978831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195973978817) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 247283 + ... + 673124.

It is an arithmetic number, because the mean of its divisors is an integer number (24678439500).

Almost surely, 2^195973978847 is an apocalyptic number.

195973978847 is a deficient number, since it is larger than the sum of its proper divisors (1453537153).

195973978847 is a wasteful number, since it uses less digits than its factorization.

195973978847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921985.

The product of its digits is 960180480, while the sum is 77.

The spelling of 195973978847 in words is "one hundred ninety-five billion, nine hundred seventy-three million, nine hundred seventy-eight thousand, eight hundred forty-seven".