85621635081 has 24 divisors (see below), whose sum is σ = 125443728384. Its totient is φ = 56270803680.

The previous prime is 85621635049. The next prime is 85621635109. The reversal of 85621635081 is 18053612658.

85621635081 is a `hidden beast` number, since 8 + 5 + 6 + 2 + 1 + 635 + 0 + 8 + 1 = 666.

It is not a de Polignac number, because 85621635081 - 2⁵ = 85621635049 is a prime.

It is a super-2 number, since 2×85621635081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85621635031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59115 + ... + 418016.

It is an arithmetic number, because the mean of its divisors is an integer number (5226822016).

Almost surely, 2^85621635081 is an apocalyptic number.

It is an amenable number.

85621635081 is a deficient number, since it is larger than the sum of its proper divisors (39822093303).

85621635081 is a wasteful number, since it uses less digits than its factorization.

85621635081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477421 (or 477418 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 85621635081 in words is "eighty-five billion, six hundred twenty-one million, six hundred thirty-five thousand, eighty-one".