195202908157 has 2 divisors, whose sum is σ = 195202908158. Its totient is φ = 195202908156.

The previous prime is 195202908143. The next prime is 195202908211. The reversal of 195202908157 is 751809202591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135281253636 + 59921654521 = 367806^2 + 244789^2 .

It is a cyclic number.

It is not a de Polignac number, because 195202908157 - 2¹⁵ = 195202875389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195202908157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195202902157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97601454078 + 97601454079.

It is an arithmetic number, because the mean of its divisors is an integer number (97601454079).

Almost surely, 2^195202908157 is an apocalyptic number.

It is an amenable number.

195202908157 is a deficient number, since it is larger than the sum of its proper divisors (1).

195202908157 is an equidigital number, since it uses as much as digits as its factorization.

195202908157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 49.

The spelling of 195202908157 in words is "one hundred ninety-five billion, two hundred two million, nine hundred eight thousand, one hundred fifty-seven".