85861048840 has 128 divisors (see below), whose sum is σ = 230571048960. Its totient is φ = 28135413504.

The previous prime is 85861048813. The next prime is 85861048841. The reversal of 85861048840 is 4884016858.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (85861048841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9185209 + ... + 9194551.

It is an arithmetic number, because the mean of its divisors is an integer number (1801336320).

Almost surely, 2^85861048840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85861048840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115285524480).

85861048840 is an abundant number, since it is smaller than the sum of its proper divisors (144710000120).

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

85861048840 is a wasteful number, since it uses less digits than its factorization.

85861048840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10811 (or 10807 counting only the distinct ones).

The product of its (nonzero) digits is 1966080, while the sum is 52.

The spelling of 85861048840 in words is "eighty-five billion, eight hundred sixty-one million, forty-eight thousand, eight hundred forty".