11865742769 has 2 divisors, whose sum is σ = 11865742770. Its totient is φ = 11865742768.

The previous prime is 11865742751. The next prime is 11865742789. The reversal of 11865742769 is 96724756811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8321088400 + 3544654369 = 91220^2 + 59537^2 .

It is a cyclic number.

It is not a de Polignac number, because 11865742769 - 2⁸ = 11865742513 is a prime.

It is a super-2 number, since 2×11865742769² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11865742789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5932871384 + 5932871385.

It is an arithmetic number, because the mean of its divisors is an integer number (5932871385).

Almost surely, 2^11865742769 is an apocalyptic number.

It is an amenable number.

11865742769 is a deficient number, since it is larger than the sum of its proper divisors (1).

11865742769 is an equidigital number, since it uses as much as digits as its factorization.

11865742769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 56.

The spelling of 11865742769 in words is "eleven billion, eight hundred sixty-five million, seven hundred forty-two thousand, seven hundred sixty-nine".