64606405387 has 2 divisors, whose sum is σ = 64606405388. Its totient is φ = 64606405386.

The previous prime is 64606405327. The next prime is 64606405429. The reversal of 64606405387 is 78350460646.

64606405387 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 a de Polignac number, because none of the positive numbers 2^k-64606405387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64606405387.

It is not a weakly prime, because it can be changed into another prime (64606405327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32303202693 + 32303202694.

It is an arithmetic number, because the mean of its divisors is an integer number (32303202694).

Almost surely, 2^64606405387 is an apocalyptic number.

64606405387 is a deficient number, since it is larger than the sum of its proper divisors (1).

64606405387 is an equidigital number, since it uses as much as digits as its factorization.

64606405387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 64606405387 in words is "sixty-four billion, six hundred six million, four hundred five thousand, three hundred eighty-seven".