85457854581 has 32 divisors (see below), whose sum is σ = 128244526080. Its totient is φ = 50588057520.

The previous prime is 85457854579. The next prime is 85457854609. The reversal of 85457854581 is 18545875458.

It is not a de Polignac number, because 85457854581 - 2¹ = 85457854579 is a prime.

It is a super-2 number, since 2×85457854581² (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 (85457854381) 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, 77161 + ... + 420558.

It is an arithmetic number, because the mean of its divisors is an integer number (4007641440).

Almost surely, 2^85457854581 is an apocalyptic number.

It is an amenable number.

85457854581 is a deficient number, since it is larger than the sum of its proper divisors (42786671499).

85457854581 is a wasteful number, since it uses less digits than its factorization.

85457854581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497798 (or 497776 counting only the distinct ones).

The product of its digits is 35840000, while the sum is 60.

The spelling of 85457854581 in words is "eighty-five billion, four hundred fifty-seven million, eight hundred fifty-four thousand, five hundred eighty-one".