199371967601 has 2 divisors, whose sum is σ = 199371967602. Its totient is φ = 199371967600.

The previous prime is 199371967567. The next prime is 199371967661. The reversal of 199371967601 is 106769173991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168612069376 + 30759898225 = 410624^2 + 175385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199371967601 is a prime.

It is not a weakly prime, because it can be changed into another prime (199371967661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99685983800 + 99685983801.

It is an arithmetic number, because the mean of its divisors is an integer number (99685983801).

Almost surely, 2^199371967601 is an apocalyptic number.

It is an amenable number.

199371967601 is a deficient number, since it is larger than the sum of its proper divisors (1).

199371967601 is an equidigital number, since it uses as much as digits as its factorization.

199371967601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3857868, while the sum is 59.

The spelling of 199371967601 in words is "one hundred ninety-nine billion, three hundred seventy-one million, nine hundred sixty-seven thousand, six hundred one".