65399685119 has 4 divisors (see below), whose sum is σ = 66633641496. Its totient is φ = 64165728744.

The previous prime is 65399685103. The next prime is 65399685121. The reversal of 65399685119 is 91158699356.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65399685119 - 2⁴ = 65399685103 is a prime.

It is a super-2 number, since 2×65399685119² (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 (65399685139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616978109 + ... + 616978214.

It is an arithmetic number, because the mean of its divisors is an integer number (16658410374).

Almost surely, 2^65399685119 is an apocalyptic number.

65399685119 is a deficient number, since it is larger than the sum of its proper divisors (1233956377).

65399685119 is a wasteful number, since it uses less digits than its factorization.

65399685119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233956376.

The product of its digits is 15746400, while the sum is 62.

The spelling of 65399685119 in words is "sixty-five billion, three hundred ninety-nine million, six hundred eighty-five thousand, one hundred nineteen".