85531870580 has 96 divisors (see below), whose sum is σ = 196375399584. Its totient is φ = 31102009344.

The previous prime is 85531870559. The next prime is 85531870597. The reversal of 85531870580 is 8507813558.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 53514494224 + 32017376356 = 231332^2 + 178934^2 .

It is a super-3 number, since 3×85531870580³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14364884 + ... + 14370836.

It is an arithmetic number, because the mean of its divisors is an integer number (2045577079).

Almost surely, 2^85531870580 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 85531870580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98187699792).

85531870580 is an abundant number, since it is smaller than the sum of its proper divisors (110843529004).

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

85531870580 is a wasteful number, since it uses less digits than its factorization.

85531870580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6805 (or 6803 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 50.

The spelling of 85531870580 in words is "eighty-five billion, five hundred thirty-one million, eight hundred seventy thousand, five hundred eighty".