65523640139 has 2 divisors, whose sum is σ = 65523640140. Its totient is φ = 65523640138.

The previous prime is 65523640123. The next prime is 65523640153. The reversal of 65523640139 is 93104632556.

65523640139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65523640139 - 2⁴ = 65523640123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65523640139.

It is not a weakly prime, because it can be changed into another prime (65523640439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32761820069 + 32761820070.

It is an arithmetic number, because the mean of its divisors is an integer number (32761820070).

Almost surely, 2^65523640139 is an apocalyptic number.

65523640139 is a deficient number, since it is larger than the sum of its proper divisors (1).

65523640139 is an equidigital number, since it uses as much as digits as its factorization.

65523640139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 65523640139 in words is "sixty-five billion, five hundred twenty-three million, six hundred forty thousand, one hundred thirty-nine".