85473529721 has 4 divisors (see below), whose sum is σ = 85475673600. Its totient is φ = 85471385844.

The previous prime is 85473529711. The next prime is 85473529793. The reversal of 85473529721 is 12792537458.

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 a cyclic number.

It is not a de Polignac number, because 85473529721 - 2⁶ = 85473529657 is a prime.

It is a super-3 number, since 3×85473529721³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85473529711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010981 + ... + 1092258.

It is an arithmetic number, because the mean of its divisors is an integer number (21368918400).

Almost surely, 2^85473529721 is an apocalyptic number.

It is an amenable number.

85473529721 is a deficient number, since it is larger than the sum of its proper divisors (2143879).

85473529721 is a wasteful number, since it uses less digits than its factorization.

85473529721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143878.

The product of its digits is 4233600, while the sum is 53.

The spelling of 85473529721 in words is "eighty-five billion, four hundred seventy-three million, five hundred twenty-nine thousand, seven hundred twenty-one".