85558511 has 2 divisors, whose sum is σ = 85558512. Its totient is φ = 85558510.

The previous prime is 85558507. The next prime is 85558523. The reversal of 85558511 is 11585558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85558511 - 2² = 85558507 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85558111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42779255 + 42779256.

It is an arithmetic number, because the mean of its divisors is an integer number (42779256).

Almost surely, 2^85558511 is an apocalyptic number.

85558511 is a deficient number, since it is larger than the sum of its proper divisors (1).

85558511 is an equidigital number, since it uses as much as digits as its factorization.

85558511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40000, while the sum is 38.

The square root of 85558511 is about 9249.7843758652. The cubic root of 85558511 is about 440.6438765348.

The spelling of 85558511 in words is "eighty-five million, five hundred fifty-eight thousand, five hundred eleven".