195631537237 has 2 divisors, whose sum is σ = 195631537238. Its totient is φ = 195631537236.

The previous prime is 195631537229. The next prime is 195631537271. The reversal of 195631537237 is 732735136591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183191704081 + 12439833156 = 428009^2 + 111534^2 .

It is a cyclic number.

It is not a de Polignac number, because 195631537237 - 2³ = 195631537229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195631537217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97815768618 + 97815768619.

It is an arithmetic number, because the mean of its divisors is an integer number (97815768619).

Almost surely, 2^195631537237 is an apocalyptic number.

It is an amenable number.

195631537237 is a deficient number, since it is larger than the sum of its proper divisors (1).

195631537237 is an equidigital number, since it uses as much as digits as its factorization.

195631537237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3572100, while the sum is 52.

The spelling of 195631537237 in words is "one hundred ninety-five billion, six hundred thirty-one million, five hundred thirty-seven thousand, two hundred thirty-seven".