85072641865 has 8 divisors (see below), whose sum is σ = 103139615880. Its totient is φ = 67356483072.

The previous prime is 85072641859. The next prime is 85072641883. The reversal of 85072641865 is 56814627058.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16911441936 + 68161199929 = 130044^2 + 261077^2 .

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 85072641865 - 2²³ = 85064253257 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 87703270 + ... + 87704239.

It is an arithmetic number, because the mean of its divisors is an integer number (12892451985).

Almost surely, 2^85072641865 is an apocalyptic number.

It is an amenable number.

85072641865 is a deficient number, since it is larger than the sum of its proper divisors (18066974015).

85072641865 is a wasteful number, since it uses less digits than its factorization.

85072641865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175407611.

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 85072641865 in words is "eighty-five billion, seventy-two million, six hundred forty-one thousand, eight hundred sixty-five".