65335294990081 has 16 divisors (see below), whose sum is σ = 65850958146960. Its totient is φ = 64820938440960.

The previous prime is 65335294990073. The next prime is 65335294990117. The reversal of 65335294990081 is 18009949253356.

It can be written as a sum of positive squares in 8 ways, for example, as 7617710400400 + 57717584589681 = 2760020^2 + 7597209^2 .

It is a cyclic number.

It is not a de Polignac number, because 65335294990081 - 2³ = 65335294990073 is a prime.

It is a super-2 number, since 2×65335294990081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65335294989995 and 65335294990022.

It is not an unprimeable number, because it can be changed into a prime (65335294990001) 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, 447070635 + ... + 447216751.

It is an arithmetic number, because the mean of its divisors is an integer number (4115684884185).

Almost surely, 2^{65335294990081} is an apocalyptic number.

It is an amenable number.

65335294990081 is a deficient number, since it is larger than the sum of its proper divisors (515663156879).

65335294990081 is a wasteful number, since it uses less digits than its factorization.

65335294990081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150564.

The product of its (nonzero) digits is 62985600, while the sum is 64.

The spelling of 65335294990081 in words is "sixty-five trillion, three hundred thirty-five billion, two hundred ninety-four million, nine hundred ninety thousand, eighty-one".