85721308801 has 16 divisors (see below), whose sum is σ = 88168812480. Its totient is φ = 83308861440.

The previous prime is 85721308769. The next prime is 85721308807. The reversal of 85721308801 is 10880312758.

It is a cyclic number.

It is not a de Polignac number, because 85721308801 - 2⁵ = 85721308769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85721308807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5583706 + ... + 5599036.

It is an arithmetic number, because the mean of its divisors is an integer number (5510550780).

Almost surely, 2^85721308801 is an apocalyptic number.

It is an amenable number.

85721308801 is a deficient number, since it is larger than the sum of its proper divisors (2447503679).

85721308801 is a wasteful number, since it uses less digits than its factorization.

85721308801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16464.

The product of its (nonzero) digits is 107520, while the sum is 43.

The spelling of 85721308801 in words is "eighty-five billion, seven hundred twenty-one million, three hundred eight thousand, eight hundred one".