195923887157 has 2 divisors, whose sum is σ = 195923887158. Its totient is φ = 195923887156.

The previous prime is 195923887153. The next prime is 195923887249. The reversal of 195923887157 is 751788329591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136160262001 + 59763625156 = 368999^2 + 244466^2 .

It is a cyclic number.

It is not a de Polignac number, because 195923887157 - 2² = 195923887153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 195923887093 and 195923887102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195923887151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97961943578 + 97961943579.

It is an arithmetic number, because the mean of its divisors is an integer number (97961943579).

Almost surely, 2^195923887157 is an apocalyptic number.

It is an amenable number.

195923887157 is a deficient number, since it is larger than the sum of its proper divisors (1).

195923887157 is an equidigital number, since it uses as much as digits as its factorization.

195923887157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38102400, while the sum is 65.

The spelling of 195923887157 in words is "one hundred ninety-five billion, nine hundred twenty-three million, eight hundred eighty-seven thousand, one hundred fifty-seven".