85420292180 has 18 divisors (see below), whose sum is σ = 179385358446. Its totient is φ = 34167594048.

The previous prime is 85420292161. The next prime is 85420292203. The reversal of 85420292180 is 8129202458.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 41321132176 + 44099160004 = 203276^2 + 209998^2 .

It is a super-2 number, since 2×85420292180² (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 5 ways as a sum of consecutive naturals, for example, 1274384 + ... + 1339736.

It is an arithmetic number, because the mean of its divisors is an integer number (9965853247).

Almost surely, 2^85420292180 is an apocalyptic number.

It is an amenable number.

85420292180 is an abundant number, since it is smaller than the sum of its proper divisors (93965066266).

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

85420292180 is an frugal number, since it uses more digits than its factorization.

85420292180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130715 (or 65360 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 85420292180 in words is "eighty-five billion, four hundred twenty million, two hundred ninety-two thousand, one hundred eighty".