11951566848019 has 2 divisors, whose sum is σ = 11951566848020. Its totient is φ = 11951566848018.

The previous prime is 11951566847971. The next prime is 11951566848041. The reversal of 11951566848019 is 91084866515911.

It is a strong prime.

It is an emirp because it is prime and its reverse (91084866515911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11951566848019 - 2¹¹ = 11951566845971 is a prime.

It is a super-2 number, since 2×11951566848019² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11951566848619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5975783424009 + 5975783424010.

It is an arithmetic number, because the mean of its divisors is an integer number (5975783424010).

Almost surely, 2^{11951566848019} is an apocalyptic number.

11951566848019 is a deficient number, since it is larger than the sum of its proper divisors (1).

11951566848019 is an equidigital number, since it uses as much as digits as its factorization.

11951566848019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18662400, while the sum is 64.

The spelling of 11951566848019 in words is "eleven trillion, nine hundred fifty-one billion, five hundred sixty-six million, eight hundred forty-eight thousand, nineteen".