85372395678721 has 8 divisors (see below), whose sum is σ = 86612912302464. Its totient is φ = 84132937069440.

The previous prime is 85372395678709. The next prime is 85372395678749. The reversal of 85372395678721 is 12787659327358.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-85372395678721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85372395678821) 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, 264341061 + ... + 264663826.

It is an arithmetic number, because the mean of its divisors is an integer number (10826614037808).

Almost surely, 2^{85372395678721} is an apocalyptic number.

It is an amenable number.

85372395678721 is a deficient number, since it is larger than the sum of its proper divisors (1240516623743).

85372395678721 is a wasteful number, since it uses less digits than its factorization.

85372395678721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529007231.

The product of its digits is 1066867200, while the sum is 73.

The spelling of 85372395678721 in words is "eighty-five trillion, three hundred seventy-two billion, three hundred ninety-five million, six hundred seventy-eight thousand, seven hundred twenty-one".