65397139019 has 2 divisors, whose sum is σ = 65397139020. Its totient is φ = 65397139018.

The previous prime is 65397139007. The next prime is 65397139117. The reversal of 65397139019 is 91093179356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65397139019 - 2¹² = 65397134923 is a prime.

It is a super-2 number, since 2×65397139019² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (65397139519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32698569509 + 32698569510.

It is an arithmetic number, because the mean of its divisors is an integer number (32698569510).

Almost surely, 2^65397139019 is an apocalyptic number.

65397139019 is a deficient number, since it is larger than the sum of its proper divisors (1).

65397139019 is an equidigital number, since it uses as much as digits as its factorization.

65397139019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1377810, while the sum is 53.

The spelling of 65397139019 in words is "sixty-five billion, three hundred ninety-seven million, one hundred thirty-nine thousand, nineteen".