199945757687359 has 2 divisors, whose sum is σ = 199945757687360. Its totient is φ = 199945757687358.

The previous prime is 199945757687297. The next prime is 199945757687527. The reversal of 199945757687359 is 953786757549991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199945757687359 - 2⁹ = 199945757686847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199945757627359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99972878843679 + 99972878843680.

It is an arithmetic number, because the mean of its divisors is an integer number (99972878843680).

Almost surely, 2^{199945757687359} is an apocalyptic number.

199945757687359 is a deficient number, since it is larger than the sum of its proper divisors (1).

199945757687359 is an equidigital number, since it uses as much as digits as its factorization.

199945757687359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162030456000, while the sum is 94.

The spelling of 199945757687359 in words is "one hundred ninety-nine trillion, nine hundred forty-five billion, seven hundred fifty-seven million, six hundred eighty-seven thousand, three hundred fifty-nine".