64813680727 has 2 divisors, whose sum is σ = 64813680728. Its totient is φ = 64813680726.

The previous prime is 64813680671. The next prime is 64813680749. The reversal of 64813680727 is 72708631846.

64813680727 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 64813680727 - 2²⁷ = 64679462999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64813620727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32406840363 + 32406840364.

It is an arithmetic number, because the mean of its divisors is an integer number (32406840364).

Almost surely, 2^64813680727 is an apocalyptic number.

64813680727 is a deficient number, since it is larger than the sum of its proper divisors (1).

64813680727 is an equidigital number, since it uses as much as digits as its factorization.

64813680727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 64813680727 in words is "sixty-four billion, eight hundred thirteen million, six hundred eighty thousand, seven hundred twenty-seven".