65920113085 has 8 divisors (see below), whose sum is σ = 79203392856. Its totient is φ = 52669919040.

The previous prime is 65920113047. The next prime is 65920113089. The reversal of 65920113085 is 58031102956.

It can be written as a sum of positive squares in 4 ways, for example, as 14179331929 + 51740781156 = 119077^2 + 227466^2 .

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-65920113085 is a prime.

It is a super-2 number, since 2×65920113085² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65920113089) 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, 8267046 + ... + 8275015.

It is an arithmetic number, because the mean of its divisors is an integer number (9900424107).

Almost surely, 2^65920113085 is an apocalyptic number.

It is an amenable number.

65920113085 is a deficient number, since it is larger than the sum of its proper divisors (13283279771).

65920113085 is a wasteful number, since it uses less digits than its factorization.

65920113085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16542863.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 65920113085 in words is "sixty-five billion, nine hundred twenty million, one hundred thirteen thousand, eighty-five".