85231274720 has 24 divisors (see below), whose sum is σ = 201358886904. Its totient is φ = 34092509824.

The previous prime is 85231274693. The next prime is 85231274759. The reversal of 85231274720 is 2747213258.

It is a super-2 number, since 2×85231274720² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266347574 + ... + 266347893.

It is an arithmetic number, because the mean of its divisors is an integer number (8389953621).

Almost surely, 2^85231274720 is an apocalyptic number.

85231274720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85231274720 is an abundant number, since it is smaller than the sum of its proper divisors (116127612184).

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

85231274720 is a wasteful number, since it uses less digits than its factorization.

85231274720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532695482 (or 532695474 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

Adding to 85231274720 its reverse (2747213258), we get a palindrome (87978487978).

The spelling of 85231274720 in words is "eighty-five billion, two hundred thirty-one million, two hundred seventy-four thousand, seven hundred twenty".