195196828649 has 2 divisors, whose sum is σ = 195196828650. Its totient is φ = 195196828648.

The previous prime is 195196828639. The next prime is 195196828657. The reversal of 195196828649 is 946828691591.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190363798249 + 4833030400 = 436307^2 + 69520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195196828649 is a prime.

It is not a weakly prime, because it can be changed into another prime (195196828639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97598414324 + 97598414325.

It is an arithmetic number, because the mean of its divisors is an integer number (97598414325).

Almost surely, 2^195196828649 is an apocalyptic number.

It is an amenable number.

195196828649 is a deficient number, since it is larger than the sum of its proper divisors (1).

195196828649 is an equidigital number, since it uses as much as digits as its factorization.

195196828649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67184640, while the sum is 68.

The spelling of 195196828649 in words is "one hundred ninety-five billion, one hundred ninety-six million, eight hundred twenty-eight thousand, six hundred forty-nine".