65442440387 has 2 divisors, whose sum is σ = 65442440388. Its totient is φ = 65442440386.

The previous prime is 65442440383. The next prime is 65442440447. The reversal of 65442440387 is 78304424456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65442440387 - 2² = 65442440383 is a prime.

It is not a weakly prime, because it can be changed into another prime (65442440383) 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, 32721220193 + 32721220194.

It is an arithmetic number, because the mean of its divisors is an integer number (32721220194).

Almost surely, 2^65442440387 is an apocalyptic number.

65442440387 is a deficient number, since it is larger than the sum of its proper divisors (1).

65442440387 is an equidigital number, since it uses as much as digits as its factorization.

65442440387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2580480, while the sum is 47.

The spelling of 65442440387 in words is "sixty-five billion, four hundred forty-two million, four hundred forty thousand, three hundred eighty-seven".