65111991307 has 16 divisors (see below), whose sum is σ = 72250392960. Its totient is φ = 58177201600.

The previous prime is 65111991283. The next prime is 65111991323. The reversal of 65111991307 is 70319911156.

It is a cyclic number.

It is not a de Polignac number, because 65111991307 - 2¹⁹ = 65111467019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65111992307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4672983 + ... + 4686895.

It is an arithmetic number, because the mean of its divisors is an integer number (4515649560).

Almost surely, 2^65111991307 is an apocalyptic number.

65111991307 is a deficient number, since it is larger than the sum of its proper divisors (7138401653).

65111991307 is a wasteful number, since it uses less digits than its factorization.

65111991307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21194.

The product of its (nonzero) digits is 51030, while the sum is 43.

The spelling of 65111991307 in words is "sixty-five billion, one hundred eleven million, nine hundred ninety-one thousand, three hundred seven".