85722928664 has 8 divisors (see below), whose sum is σ = 160730491260. Its totient is φ = 42861464328.

The previous prime is 85722928661. The next prime is 85722928673. The reversal of 85722928664 is 46682922758.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85722928661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5357683034 + ... + 5357683049.

Almost surely, 2^85722928664 is an apocalyptic number.

It is an amenable number.

85722928664 is a deficient number, since it is larger than the sum of its proper divisors (75007562596).

85722928664 is a wasteful number, since it uses less digits than its factorization.

85722928664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10715366089 (or 10715366085 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 59.

The spelling of 85722928664 in words is "eighty-five billion, seven hundred twenty-two million, nine hundred twenty-eight thousand, six hundred sixty-four".