64650412256491 has 2 divisors, whose sum is σ = 64650412256492. Its totient is φ = 64650412256490.

The previous prime is 64650412256401. The next prime is 64650412256527. The reversal of 64650412256491 is 19465221405646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64650412256491 - 2²⁵ = 64650378702059 is a prime.

It is not a weakly prime, because it can be changed into another prime (64650412256401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32325206128245 + 32325206128246.

It is an arithmetic number, because the mean of its divisors is an integer number (32325206128246).

Almost surely, 2^{64650412256491} is an apocalyptic number.

64650412256491 is a deficient number, since it is larger than the sum of its proper divisors (1).

64650412256491 is an equidigital number, since it uses as much as digits as its factorization.

64650412256491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12441600, while the sum is 55.

The spelling of 64650412256491 in words is "sixty-four trillion, six hundred fifty billion, four hundred twelve million, two hundred fifty-six thousand, four hundred ninety-one".