196135395857 has 2 divisors, whose sum is σ = 196135395858. Its totient is φ = 196135395856.

The previous prime is 196135395787. The next prime is 196135395871. The reversal of 196135395857 is 758593531691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195908923456 + 226472401 = 442616^2 + 15049^2 .

It is a cyclic number.

It is not a de Polignac number, because 196135395857 - 2³⁰ = 195061654033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 196135395857.

It is not a weakly prime, because it can be changed into another prime (196135395457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98067697928 + 98067697929.

It is an arithmetic number, because the mean of its divisors is an integer number (98067697929).

Almost surely, 2^196135395857 is an apocalyptic number.

It is an amenable number.

196135395857 is a deficient number, since it is larger than the sum of its proper divisors (1).

196135395857 is an equidigital number, since it uses as much as digits as its factorization.

196135395857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618000, while the sum is 62.

The spelling of 196135395857 in words is "one hundred ninety-six billion, one hundred thirty-five million, three hundred ninety-five thousand, eight hundred fifty-seven".