19910297244699 has 6 divisors (see below), whose sum is σ = 28759318242356. Its totient is φ = 13273531496460.

The previous prime is 19910297244679. The next prime is 19910297244727. The reversal of 19910297244699 is 99644279201991.

19910297244699 is a `hidden beast` number, since 1 + 9 + 9 + 1 + 0 + 2 + 97 + 2 + 446 + 99 = 666.

It is not a de Polignac number, because 19910297244699 - 2⁵ = 19910297244667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19910297244679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1106127624697 + ... + 1106127624714.

Almost surely, 2^{19910297244699} is an apocalyptic number.

19910297244699 is a deficient number, since it is larger than the sum of its proper divisors (8849020997657).

19910297244699 is a wasteful number, since it uses less digits than its factorization.

19910297244699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212255249417 (or 2212255249414 counting only the distinct ones).

The product of its (nonzero) digits is 158723712, while the sum is 72.

The spelling of 19910297244699 in words is "nineteen trillion, nine hundred ten billion, two hundred ninety-seven million, two hundred forty-four thousand, six hundred ninety-nine".