85871444292 has 36 divisors (see below), whose sum is σ = 217261899036. Its totient is φ = 28597708800.

The previous prime is 85871444291. The next prime is 85871444297. The reversal of 85871444292 is 29244417858.

85871444292 is a `hidden beast` number, since 8 + 587 + 14 + 4 + 42 + 9 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39845748996 + 46025695296 = 199614^2 + 214536^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (85871444291) 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, 1047709 + ... + 1126692.

It is an arithmetic number, because the mean of its divisors is an integer number (6035052751).

Almost surely, 2^85871444292 is an apocalyptic number.

It is an amenable number.

85871444292 is an abundant number, since it is smaller than the sum of its proper divisors (131390454744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85871444292 is a wasteful number, since it uses less digits than its factorization.

85871444292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175508 (or 2175503 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The spelling of 85871444292 in words is "eighty-five billion, eight hundred seventy-one million, four hundred forty-four thousand, two hundred ninety-two".