64520040679 has 2 divisors, whose sum is σ = 64520040680. Its totient is φ = 64520040678.

The previous prime is 64520040667. The next prime is 64520040691. The reversal of 64520040679 is 97604002546.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (64520040667) and next prime (64520040691).

It is a cyclic number.

It is not a de Polignac number, because 64520040679 - 2¹⁷ = 64519909607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64520040659) 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, 32260020339 + 32260020340.

It is an arithmetic number, because the mean of its divisors is an integer number (32260020340).

Almost surely, 2^64520040679 is an apocalyptic number.

64520040679 is a deficient number, since it is larger than the sum of its proper divisors (1).

64520040679 is an equidigital number, since it uses as much as digits as its factorization.

64520040679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 64520040679 in words is "sixty-four billion, five hundred twenty million, forty thousand, six hundred seventy-nine".