85807431542847 has 12 divisors (see below), whose sum is σ = 133089077495256. Its totient is φ = 49032818024400.

The previous prime is 85807431542821. The next prime is 85807431542879. The reversal of 85807431542847 is 74824513470858.

It is a de Polignac number, because none of the positive numbers 2^k-85807431542847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85807431542897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 291862011904 + ... + 291862012197.

It is an arithmetic number, because the mean of its divisors is an integer number (11090756457938).

Almost surely, 2^{85807431542847} is an apocalyptic number.

85807431542847 is a deficient number, since it is larger than the sum of its proper divisors (47281645952409).

85807431542847 is a wasteful number, since it uses less digits than its factorization.

85807431542847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583724024118 (or 583724024111 counting only the distinct ones).

The product of its (nonzero) digits is 240844800, while the sum is 66.

The spelling of 85807431542847 in words is "eighty-five trillion, eight hundred seven billion, four hundred thirty-one million, five hundred forty-two thousand, eight hundred forty-seven".