11564853908551 has 2 divisors, whose sum is σ = 11564853908552. Its totient is φ = 11564853908550.

The previous prime is 11564853908549. The next prime is 11564853908591. The reversal of 11564853908551 is 15580935846511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11564853908551 - 2¹ = 11564853908549 is a prime.

It is a super-2 number, since 2×11564853908551² (a number of 27 digits) contains 22 as substring.

Together with 11564853908549, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11564853908551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11564853908501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782426954275 + 5782426954276.

It is an arithmetic number, because the mean of its divisors is an integer number (5782426954276).

Almost surely, 2^{11564853908551} is an apocalyptic number.

11564853908551 is a deficient number, since it is larger than the sum of its proper divisors (1).

11564853908551 is an equidigital number, since it uses as much as digits as its factorization.

11564853908551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920000, while the sum is 61.

The spelling of 11564853908551 in words is "eleven trillion, five hundred sixty-four billion, eight hundred fifty-three million, nine hundred eight thousand, five hundred fifty-one".