199518306707 has 2 divisors, whose sum is σ = 199518306708. Its totient is φ = 199518306706.

The previous prime is 199518306619. The next prime is 199518306731. The reversal of 199518306707 is 707603815991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199518306707 - 2¹² = 199518302611 is a prime.

It is a super-2 number, since 2×199518306707² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (199518306007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99759153353 + 99759153354.

It is an arithmetic number, because the mean of its divisors is an integer number (99759153354).

Almost surely, 2^199518306707 is an apocalyptic number.

199518306707 is a deficient number, since it is larger than the sum of its proper divisors (1).

199518306707 is an equidigital number, since it uses as much as digits as its factorization.

199518306707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The spelling of 199518306707 in words is "one hundred ninety-nine billion, five hundred eighteen million, three hundred six thousand, seven hundred seven".