649562773823 has 2 divisors, whose sum is σ = 649562773824. Its totient is φ = 649562773822.

The previous prime is 649562773781. The next prime is 649562773901. The reversal of 649562773823 is 328377265946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649562773823 - 2²⁴ = 649545996607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649562776823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324781386911 + 324781386912.

It is an arithmetic number, because the mean of its divisors is an integer number (324781386912).

Almost surely, 2^649562773823 is an apocalyptic number.

649562773823 is a deficient number, since it is larger than the sum of its proper divisors (1).

649562773823 is an equidigital number, since it uses as much as digits as its factorization.

649562773823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91445760, while the sum is 62.

The spelling of 649562773823 in words is "six hundred forty-nine billion, five hundred sixty-two million, seven hundred seventy-three thousand, eight hundred twenty-three".