195191917597 has 2 divisors, whose sum is σ = 195191917598. Its totient is φ = 195191917596.

The previous prime is 195191917589. The next prime is 195191917717. The reversal of 195191917597 is 795719191591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100518166116 + 94673751481 = 317046^2 + 307691^2 .

It is a cyclic number.

It is not a de Polignac number, because 195191917597 - 2³ = 195191917589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195491917597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97595958798 + 97595958799.

It is an arithmetic number, because the mean of its divisors is an integer number (97595958799).

Almost surely, 2^195191917597 is an apocalyptic number.

It is an amenable number.

195191917597 is a deficient number, since it is larger than the sum of its proper divisors (1).

195191917597 is an equidigital number, since it uses as much as digits as its factorization.

195191917597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8037225, while the sum is 64.

The spelling of 195191917597 in words is "one hundred ninety-five billion, one hundred ninety-one million, nine hundred seventeen thousand, five hundred ninety-seven".