11854765455569 has 2 divisors, whose sum is σ = 11854765455570. Its totient is φ = 11854765455568.

The previous prime is 11854765455539. The next prime is 11854765455671. The reversal of 11854765455569 is 96555456745811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9194164067344 + 2660601388225 = 3032188^2 + 1631135^2 .

It is a cyclic number.

It is not a de Polignac number, because 11854765455569 - 2⁴⁰ = 10755253827793 is a prime.

It is a super-2 number, since 2×11854765455569² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11854765455539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5927382727784 + 5927382727785.

It is an arithmetic number, because the mean of its divisors is an integer number (5927382727785).

Almost surely, 2^{11854765455569} is an apocalyptic number.

It is an amenable number.

11854765455569 is a deficient number, since it is larger than the sum of its proper divisors (1).

11854765455569 is an equidigital number, since it uses as much as digits as its factorization.

11854765455569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200000, while the sum is 71.

The spelling of 11854765455569 in words is "eleven trillion, eight hundred fifty-four billion, seven hundred sixty-five million, four hundred fifty-five thousand, five hundred sixty-nine".