65209068509013 has 64 divisors (see below), whose sum is σ = 115189151616000. Its totient is φ = 35936111090880.

The previous prime is 65209068508999. The next prime is 65209068509063. The reversal of 65209068509013 is 31090586090256.

It is a happy number.

65209068509013 is a `hidden beast` number, since 6 + 520 + 9 + 0 + 68 + 50 + 9 + 0 + 1 + 3 = 666.

It is not a de Polignac number, because 65209068509013 - 2²¹ = 65209066411861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65209068509063) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 125779863 + ... + 126297236.

It is an arithmetic number, because the mean of its divisors is an integer number (1799830494000).

Almost surely, 2^{65209068509013} is an apocalyptic number.

It is an amenable number.

65209068509013 is a deficient number, since it is larger than the sum of its proper divisors (49980083106987).

65209068509013 is a wasteful number, since it uses less digits than its factorization.

65209068509013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252077199 (or 252077193 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 65209068509013 in words is "sixty-five trillion, two hundred nine billion, sixty-eight million, five hundred nine thousand, thirteen".