65687637139 has 2 divisors, whose sum is σ = 65687637140. Its totient is φ = 65687637138.

The previous prime is 65687637097. The next prime is 65687637143. The reversal of 65687637139 is 93173678656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65687637139 - 2¹⁷ = 65687506067 is a prime.

It is not a weakly prime, because it can be changed into another prime (65687637179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32843818569 + 32843818570.

It is an arithmetic number, because the mean of its divisors is an integer number (32843818570).

Almost surely, 2^65687637139 is an apocalyptic number.

65687637139 is a deficient number, since it is larger than the sum of its proper divisors (1).

65687637139 is an equidigital number, since it uses as much as digits as its factorization.

65687637139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34292160, while the sum is 61.

The spelling of 65687637139 in words is "sixty-five billion, six hundred eighty-seven million, six hundred thirty-seven thousand, one hundred thirty-nine".