85751726861 has 8 divisors (see below), whose sum is σ = 86753253240. Its totient is φ = 84751045632.

The previous prime is 85751726857. The next prime is 85751726887. The reversal of 85751726861 is 16862715758.

It can be written as a sum of positive squares in 4 ways, for example, as 18634980100 + 67116746761 = 136510^2 + 259069^2 .

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 85751726861 - 2² = 85751726857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85751726797 and 85751726806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85751726821) 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, 6020 + ... + 414173.

It is an arithmetic number, because the mean of its divisors is an integer number (10844156655).

Almost surely, 2^85751726861 is an apocalyptic number.

It is an amenable number.

85751726861 is a deficient number, since it is larger than the sum of its proper divisors (1001526379).

85751726861 is a wasteful number, since it uses less digits than its factorization.

85751726861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422575.

The product of its digits is 5644800, while the sum is 56.

The spelling of 85751726861 in words is "eighty-five billion, seven hundred fifty-one million, seven hundred twenty-six thousand, eight hundred sixty-one".