1968577601 has 2 divisors, whose sum is σ = 1968577602. Its totient is φ = 1968577600.

The previous prime is 1968577591. The next prime is 1968577603. The reversal of 1968577601 is 1067758691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1850290225 + 118287376 = 43015^2 + 10876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1968577601 is a prime.

Together with 1968577603, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1968577601.

It is not a weakly prime, because it can be changed into another prime (1968577603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984288800 + 984288801.

It is an arithmetic number, because the mean of its divisors is an integer number (984288801).

Almost surely, 2^1968577601 is an apocalyptic number.

It is an amenable number.

1968577601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968577601 is an equidigital number, since it uses as much as digits as its factorization.

1968577601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 1968577601 is about 44368.6556140706. The cubic root of 1968577601 is about 1253.2878990732.

The spelling of 1968577601 in words is "one billion, nine hundred sixty-eight million, five hundred seventy-seven thousand, six hundred one".