85439640814 has 24 divisors (see below), whose sum is σ = 141367375800. Its totient is φ = 38698938960.

The previous prime is 85439640799. The next prime is 85439640943. The reversal of 85439640814 is 41804693458.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555289 + ... + 692260.

It is an arithmetic number, because the mean of its divisors is an integer number (5890307325).

Almost surely, 2^85439640814 is an apocalyptic number.

85439640814 is a deficient number, since it is larger than the sum of its proper divisors (55927734986).

85439640814 is a wasteful number, since it uses less digits than its factorization.

85439640814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247856 (or 1247845 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 85439640814 in words is "eighty-five billion, four hundred thirty-nine million, six hundred forty thousand, eight hundred fourteen".