85620026881 has 9 divisors (see below), whose sum is σ = 88480431873. Its totient is φ = 82849312260.

The previous prime is 85620026831. The next prime is 85620026893. The reversal of 85620026881 is 18862002658.

The square root of 85620026881 is 292609.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 85620026881 - 2¹⁵ = 85619994113 is a prime.

It is a super-2 number, since 2×85620026881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85620026801) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9066160 + ... + 9075598.

It is an arithmetic number, because the mean of its divisors is an integer number (9831159097).

Almost surely, 2^85620026881 is an apocalyptic number.

85620026881 is the 292609-th square number.

85620026881 is the 146305-th centered octagonal number.

It is an amenable number.

85620026881 is a deficient number, since it is larger than the sum of its proper divisors (2860404992).

85620026881 is an frugal number, since it uses more digits than its factorization.

85620026881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18940 (or 9470 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 46.

The spelling of 85620026881 in words is "eighty-five billion, six hundred twenty million, twenty-six thousand, eight hundred eighty-one".