196631415257 has 4 divisors (see below), whose sum is σ = 201427303476. Its totient is φ = 191835527040.

The previous prime is 196631415247. The next prime is 196631415271. The reversal of 196631415257 is 752514136691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96047927056 + 100583488201 = 309916^2 + 317149^2 .

It is a cyclic number.

It is not a de Polignac number, because 196631415257 - 2¹⁶ = 196631349721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196631415247) 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, 2397944048 + ... + 2397944129.

It is an arithmetic number, because the mean of its divisors is an integer number (50356825869).

Almost surely, 2^196631415257 is an apocalyptic number.

It is an amenable number.

196631415257 is a deficient number, since it is larger than the sum of its proper divisors (4795888219).

196631415257 is an equidigital number, since it uses as much as digits as its factorization.

196631415257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4795888218.

The product of its digits is 1360800, while the sum is 50.

The spelling of 196631415257 in words is "one hundred ninety-six billion, six hundred thirty-one million, four hundred fifteen thousand, two hundred fifty-seven".