64520767750247 has 2 divisors, whose sum is σ = 64520767750248. Its totient is φ = 64520767750246.

The previous prime is 64520767750189. The next prime is 64520767750277. The reversal of 64520767750247 is 74205776702546.

64520767750247 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 64520767750247 - 2¹² = 64520767746151 is a prime.

It is a super-2 number, since 2×64520767750247² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64520767750247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64520767750277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32260383875123 + 32260383875124.

It is an arithmetic number, because the mean of its divisors is an integer number (32260383875124).

Almost surely, 2^{64520767750247} is an apocalyptic number.

64520767750247 is a deficient number, since it is larger than the sum of its proper divisors (1).

64520767750247 is an equidigital number, since it uses as much as digits as its factorization.

64520767750247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138297600, while the sum is 62.

The spelling of 64520767750247 in words is "sixty-four trillion, five hundred twenty billion, seven hundred sixty-seven million, seven hundred fifty thousand, two hundred forty-seven".