11815593216391 has 2 divisors, whose sum is σ = 11815593216392. Its totient is φ = 11815593216390.

The previous prime is 11815593216367. The next prime is 11815593216397. The reversal of 11815593216391 is 19361239551811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11815593216391 - 2¹¹ = 11815593214343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11815593216397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5907796608195 + 5907796608196.

It is an arithmetic number, because the mean of its divisors is an integer number (5907796608196).

Almost surely, 2^{11815593216391} is an apocalyptic number.

11815593216391 is a deficient number, since it is larger than the sum of its proper divisors (1).

11815593216391 is an equidigital number, since it uses as much as digits as its factorization.

11815593216391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 55.

The spelling of 11815593216391 in words is "eleven trillion, eight hundred fifteen billion, five hundred ninety-three million, two hundred sixteen thousand, three hundred ninety-one".