85681580041 has 4 divisors (see below), whose sum is σ = 86306993172. Its totient is φ = 85056166912.

The previous prime is 85681580021. The next prime is 85681580057. The reversal of 85681580041 is 14008518658.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54465757641 + 31215822400 = 233379^2 + 176680^2 .

It is a cyclic number.

It is not a de Polignac number, because 85681580041 - 2⁵ = 85681580009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85681579973 and 85681580000.

It is not an unprimeable number, because it can be changed into a prime (85681580011) 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, 312706360 + ... + 312706633.

It is an arithmetic number, because the mean of its divisors is an integer number (21576748293).

Almost surely, 2^85681580041 is an apocalyptic number.

It is an amenable number.

85681580041 is a deficient number, since it is larger than the sum of its proper divisors (625413131).

85681580041 is a wasteful number, since it uses less digits than its factorization.

85681580041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625413130.

The product of its (nonzero) digits is 307200, while the sum is 46.

The spelling of 85681580041 in words is "eighty-five billion, six hundred eighty-one million, five hundred eighty thousand, forty-one".