85902774520 has 128 divisors (see below), whose sum is σ = 204118548480. Its totient is φ = 32472000000.

The previous prime is 85902774479. The next prime is 85902774523. The reversal of 85902774520 is 2547720958.

It is a super-2 number, since 2×85902774520² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85902774523) 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, 69782305 + ... + 69783535.

It is an arithmetic number, because the mean of its divisors is an integer number (1594676160).

Almost surely, 2^85902774520 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 85902774520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102059274240).

85902774520 is an abundant number, since it is smaller than the sum of its proper divisors (118215773960).

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

85902774520 is a wasteful number, since it uses less digits than its factorization.

85902774520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117 (or 2113 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 85902774520 in words is "eighty-five billion, nine hundred two million, seven hundred seventy-four thousand, five hundred twenty".