43085558861 has 2 divisors, whose sum is σ = 43085558862. Its totient is φ = 43085558860.

The previous prime is 43085558833. The next prime is 43085558899. The reversal of 43085558861 is 16885558034.

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., 27359144836 + 15726414025 = 165406^2 + 125405^2 .

It is a cyclic number.

It is not a de Polignac number, because 43085558861 - 2⁶ = 43085558797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43085558801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21542779430 + 21542779431.

It is an arithmetic number, because the mean of its divisors is an integer number (21542779431).

Almost surely, 2^43085558861 is an apocalyptic number.

It is an amenable number.

43085558861 is a deficient number, since it is larger than the sum of its proper divisors (1).

43085558861 is an equidigital number, since it uses as much as digits as its factorization.

43085558861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608000, while the sum is 53.

The spelling of 43085558861 in words is "forty-three billion, eighty-five million, five hundred fifty-eight thousand, eight hundred sixty-one".