11817252518431 has 2 divisors, whose sum is σ = 11817252518432. Its totient is φ = 11817252518430.

The previous prime is 11817252518329. The next prime is 11817252518497. The reversal of 11817252518431 is 13481525271811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11817252518431 - 2²¹ = 11817250421279 is a prime.

It is a super-2 number, since 2×11817252518431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11817252510431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5908626259215 + 5908626259216.

It is an arithmetic number, because the mean of its divisors is an integer number (5908626259216).

Almost surely, 2^{11817252518431} is an apocalyptic number.

11817252518431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11817252518431 is an equidigital number, since it uses as much as digits as its factorization.

11817252518431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 537600, while the sum is 49.

The spelling of 11817252518431 in words is "eleven trillion, eight hundred seventeen billion, two hundred fifty-two million, five hundred eighteen thousand, four hundred thirty-one".