85810389433 has 2 divisors, whose sum is σ = 85810389434. Its totient is φ = 85810389432.

The previous prime is 85810389391. The next prime is 85810389493. The reversal of 85810389433 is 33498301858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76130190889 + 9680198544 = 275917^2 + 98388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85810389433 is a prime.

It is a super-2 number, since 2×85810389433² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85810389493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42905194716 + 42905194717.

It is an arithmetic number, because the mean of its divisors is an integer number (42905194717).

Almost surely, 2^85810389433 is an apocalyptic number.

It is an amenable number.

85810389433 is a deficient number, since it is larger than the sum of its proper divisors (1).

85810389433 is an equidigital number, since it uses as much as digits as its factorization.

85810389433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 85810389433 in words is "eighty-five billion, eight hundred ten million, three hundred eighty-nine thousand, four hundred thirty-three".