85901611993 has 8 divisors (see below), whose sum is σ = 88229378120. Its totient is φ = 83574167040.

The previous prime is 85901611969. The next prime is 85901612021. The reversal of 85901611993 is 39911610958.

It can be written as a sum of positive squares in 4 ways, for example, as 49492011024 + 36409600969 = 222468^2 + 190813^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85901611993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85901611993.

It is not an unprimeable number, because it can be changed into a prime (85901611963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522313 + ... + 666793.

It is an arithmetic number, because the mean of its divisors is an integer number (11028672265).

Almost surely, 2^85901611993 is an apocalyptic number.

It is an amenable number.

85901611993 is a deficient number, since it is larger than the sum of its proper divisors (2327766127).

85901611993 is a wasteful number, since it uses less digits than its factorization.

85901611993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160587.

The product of its (nonzero) digits is 524880, while the sum is 52.

The spelling of 85901611993 in words is "eighty-five billion, nine hundred one million, six hundred eleven thousand, nine hundred ninety-three".