85890640834 has 16 divisors (see below), whose sum is σ = 130807535040. Its totient is φ = 42291457360.

The previous prime is 85890640819. The next prime is 85890640859. The reversal of 85890640834 is 43804609858.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780229 + ... + 883480.

It is an arithmetic number, because the mean of its divisors is an integer number (8175470940).

Almost surely, 2^85890640834 is an apocalyptic number.

85890640834 is a deficient number, since it is larger than the sum of its proper divisors (44916894206).

85890640834 is a wasteful number, since it uses less digits than its factorization.

85890640834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664105.

The product of its (nonzero) digits is 6635520, while the sum is 55.

The spelling of 85890640834 in words is "eighty-five billion, eight hundred ninety million, six hundred forty thousand, eight hundred thirty-four".