85573494489 has 64 divisors (see below), whose sum is σ = 140005376000. Its totient is φ = 45407718720.

The previous prime is 85573494467. The next prime is 85573494493. The reversal of 85573494489 is 98449437558.

It is a happy number.

It is not a de Polignac number, because 85573494489 - 2⁷ = 85573494361 is a prime.

It is a super-2 number, since 2×85573494489² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85573494689) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4371654 + ... + 4391184.

It is an arithmetic number, because the mean of its divisors is an integer number (2187584000).

Almost surely, 2^85573494489 is an apocalyptic number.

It is an amenable number.

85573494489 is a deficient number, since it is larger than the sum of its proper divisors (54431881511).

85573494489 is a wasteful number, since it uses less digits than its factorization.

85573494489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19778.

The product of its digits is 174182400, while the sum is 66.

The spelling of 85573494489 in words is "eighty-five billion, five hundred seventy-three million, four hundred ninety-four thousand, four hundred eighty-nine".