195604894657 has 2 divisors, whose sum is σ = 195604894658. Its totient is φ = 195604894656.

The previous prime is 195604894543. The next prime is 195604894687. The reversal of 195604894657 is 756498406591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195513424561 + 91470096 = 442169^2 + 9564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195604894657 is a prime.

It is a super-3 number, since 3×195604894657³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (195604894687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97802447328 + 97802447329.

It is an arithmetic number, because the mean of its divisors is an integer number (97802447329).

Almost surely, 2^195604894657 is an apocalyptic number.

It is an amenable number.

195604894657 is a deficient number, since it is larger than the sum of its proper divisors (1).

195604894657 is an equidigital number, since it uses as much as digits as its factorization.

195604894657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65318400, while the sum is 64.

The spelling of 195604894657 in words is "one hundred ninety-five billion, six hundred four million, eight hundred ninety-four thousand, six hundred fifty-seven".