11895084581 has 2 divisors, whose sum is σ = 11895084582. Its totient is φ = 11895084580.

The previous prime is 11895084563. The next prime is 11895084709. The reversal of 11895084581 is 18548059811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7128424900 + 4766659681 = 84430^2 + 69041^2 .

It is an emirp because it is prime and its reverse (18548059811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11895084581 - 2³⁰ = 10821342757 is a prime.

It is a super-2 number, since 2×11895084581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11895089581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5947542290 + 5947542291.

It is an arithmetic number, because the mean of its divisors is an integer number (5947542291).

Almost surely, 2^11895084581 is an apocalyptic number.

It is an amenable number.

11895084581 is a deficient number, since it is larger than the sum of its proper divisors (1).

11895084581 is an equidigital number, since it uses as much as digits as its factorization.

11895084581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460800, while the sum is 50.

The spelling of 11895084581 in words is "eleven billion, eight hundred ninety-five million, eighty-four thousand, five hundred eighty-one".