85420292181 has 24 divisors (see below), whose sum is σ = 138248996544. Its totient is φ = 46689350400.

The previous prime is 85420292161. The next prime is 85420292203. The reversal of 85420292181 is 18129202458.

It is not a de Polignac number, because 85420292181 - 2⁶ = 85420292117 is a prime.

It is a super-2 number, since 2×85420292181² (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 (85420292141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12629020 + ... + 12635781.

It is an arithmetic number, because the mean of its divisors is an integer number (5760374856).

Almost surely, 2^85420292181 is an apocalyptic number.

It is an amenable number.

85420292181 is a deficient number, since it is larger than the sum of its proper divisors (52828704363).

85420292181 is a wasteful number, since it uses less digits than its factorization.

85420292181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25264841 (or 25264834 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 85420292181 in words is "eighty-five billion, four hundred twenty million, two hundred ninety-two thousand, one hundred eighty-one".