64650700823 has 2 divisors, whose sum is σ = 64650700824. Its totient is φ = 64650700822.

The previous prime is 64650700739. The next prime is 64650700867. The reversal of 64650700823 is 32800705646.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64650700823 - 2¹⁸ = 64650438679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64650706823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32325350411 + 32325350412.

It is an arithmetic number, because the mean of its divisors is an integer number (32325350412).

Almost surely, 2^64650700823 is an apocalyptic number.

64650700823 is a deficient number, since it is larger than the sum of its proper divisors (1).

64650700823 is an equidigital number, since it uses as much as digits as its factorization.

64650700823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 64650700823 in words is "sixty-four billion, six hundred fifty million, seven hundred thousand, eight hundred twenty-three".