65813801369 has 4 divisors (see below), whose sum is σ = 65814482100. Its totient is φ = 65813120640.

The previous prime is 65813801351. The next prime is 65813801371. The reversal of 65813801369 is 96310831856.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 44259744400 + 21554056969 = 210380^2 + 146813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65813801369 is a prime.

It is a super-2 number, since 2×65813801369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65813801399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165344 + ... + 398705.

It is an arithmetic number, because the mean of its divisors is an integer number (16453620525).

Almost surely, 2^65813801369 is an apocalyptic number.

It is an amenable number.

65813801369 is a deficient number, since it is larger than the sum of its proper divisors (680731).

65813801369 is a wasteful number, since it uses less digits than its factorization.

65813801369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680730.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 65813801369 in words is "sixty-five billion, eight hundred thirteen million, eight hundred one thousand, three hundred sixty-nine".