85684647751 has 8 divisors (see below), whose sum is σ = 87312751200. Its totient is φ = 84056967072.

The previous prime is 85684647743. The next prime is 85684647773. The reversal of 85684647751 is 15774648658.

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 85684647751 - 2³ = 85684647743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85684647751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85684647791) 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, 319606 + ... + 522988.

It is an arithmetic number, because the mean of its divisors is an integer number (10914093900).

Almost surely, 2^85684647751 is an apocalyptic number.

85684647751 is a deficient number, since it is larger than the sum of its proper divisors (1628103449).

85684647751 is a wasteful number, since it uses less digits than its factorization.

85684647751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211385.

The product of its digits is 45158400, while the sum is 61.

The spelling of 85684647751 in words is "eighty-five billion, six hundred eighty-four million, six hundred forty-seven thousand, seven hundred fifty-one".