195213159977 has 4 divisors (see below), whose sum is σ = 212959810896. Its totient is φ = 177466509060.

The previous prime is 195213159971. The next prime is 195213160007. The reversal of 195213159977 is 779951312591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 195213159977 - 2¹² = 195213155881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195213159971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8873325443 + ... + 8873325464.

It is an arithmetic number, because the mean of its divisors is an integer number (53239952724).

Almost surely, 2^195213159977 is an apocalyptic number.

It is an amenable number.

195213159977 is a deficient number, since it is larger than the sum of its proper divisors (17746650919).

195213159977 is a wasteful number, since it uses less digits than its factorization.

195213159977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17746650918.

The product of its digits is 5358150, while the sum is 59.

The spelling of 195213159977 in words is "one hundred ninety-five billion, two hundred thirteen million, one hundred fifty-nine thousand, nine hundred seventy-seven".