85683574021 has 8 divisors (see below), whose sum is σ = 86477016024. Its totient is φ = 84890749440.

The previous prime is 85683574007. The next prime is 85683574057. The reversal of 85683574021 is 12047538658.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1063672996 + 84619901025 = 32614^2 + 290895^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85683574021 - 2²⁷ = 85549356293 is a prime.

It is a super-2 number, since 2×85683574021² (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 (85683574001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126841 + ... + 432961.

It is an arithmetic number, because the mean of its divisors is an integer number (10809627003).

Almost surely, 2^85683574021 is an apocalyptic number.

It is an amenable number.

85683574021 is a deficient number, since it is larger than the sum of its proper divisors (793442003).

85683574021 is a wasteful number, since it uses less digits than its factorization.

85683574021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308711.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 85683574021 in words is "eighty-five billion, six hundred eighty-three million, five hundred seventy-four thousand, twenty-one".