85434643459 has 16 divisors (see below), whose sum is σ = 94238771040. Its totient is φ = 76805280000.

The previous prime is 85434643453. The next prime is 85434643501. The reversal of 85434643459 is 95434643458.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 85434643459 - 2⁷ = 85434643331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85434643453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 874639 + ... + 967399.

It is an arithmetic number, because the mean of its divisors is an integer number (5889923190).

Almost surely, 2^85434643459 is an apocalyptic number.

85434643459 is a deficient number, since it is larger than the sum of its proper divisors (8804127581).

85434643459 is a wasteful number, since it uses less digits than its factorization.

85434643459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93702.

The product of its digits is 24883200, while the sum is 55.

Subtracting 85434643459 from its reverse (95434643458), we obtain a palindrome (9999999999).

The spelling of 85434643459 in words is "eighty-five billion, four hundred thirty-four million, six hundred forty-three thousand, four hundred fifty-nine".