11817987362399 has 2 divisors, whose sum is σ = 11817987362400. Its totient is φ = 11817987362398.

The previous prime is 11817987362353. The next prime is 11817987362411. The reversal of 11817987362399 is 99326378971811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11817987362399 - 2⁸ = 11817987362143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11817987362309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5908993681199 + 5908993681200.

It is an arithmetic number, because the mean of its divisors is an integer number (5908993681200).

Almost surely, 2^{11817987362399} is an apocalyptic number.

11817987362399 is a deficient number, since it is larger than the sum of its proper divisors (1).

11817987362399 is an equidigital number, since it uses as much as digits as its factorization.

11817987362399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246903552, while the sum is 74.

The spelling of 11817987362399 in words is "eleven trillion, eight hundred seventeen billion, nine hundred eighty-seven million, three hundred sixty-two thousand, three hundred ninety-nine".