85722928665 has 32 divisors (see below), whose sum is σ = 156130937856. Its totient is φ = 39755559360.

The previous prime is 85722928661. The next prime is 85722928673. The reversal of 85722928665 is 56682922758.

It is a happy number.

It is not a de Polignac number, because 85722928665 - 2² = 85722928661 is a prime.

It is a super-3 number, since 3×85722928665³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85722928599 and 85722928608.

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11290399 + ... + 11297988.

It is an arithmetic number, because the mean of its divisors is an integer number (4879091808).

Almost surely, 2^85722928665 is an apocalyptic number.

It is an amenable number.

85722928665 is a deficient number, since it is larger than the sum of its proper divisors (70408009191).

85722928665 is a wasteful number, since it uses less digits than its factorization.

85722928665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22588429.

The product of its digits is 29030400, while the sum is 60.

The spelling of 85722928665 in words is "eighty-five billion, seven hundred twenty-two million, nine hundred twenty-eight thousand, six hundred sixty-five".