85504731573 has 4 divisors (see below), whose sum is σ = 114006308768. Its totient is φ = 57003154380.

The previous prime is 85504731563. The next prime is 85504731607. The reversal of 85504731573 is 37513740558.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 85504731573 - 2⁸ = 85504731317 is a prime.

It is a super-2 number, since 2×85504731573² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85504731523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14250788593 + ... + 14250788598.

It is an arithmetic number, because the mean of its divisors is an integer number (28501577192).

Almost surely, 2^85504731573 is an apocalyptic number.

It is an amenable number.

85504731573 is a deficient number, since it is larger than the sum of its proper divisors (28501577195).

85504731573 is a wasteful number, since it uses less digits than its factorization.

85504731573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28501577194.

The product of its (nonzero) digits is 1764000, while the sum is 48.

The spelling of 85504731573 in words is "eighty-five billion, five hundred four million, seven hundred thirty-one thousand, five hundred seventy-three".