646836314807 has 2 divisors, whose sum is σ = 646836314808. Its totient is φ = 646836314806.

The previous prime is 646836314791. The next prime is 646836314869. The reversal of 646836314807 is 708413638646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646836314807 - 2⁴ = 646836314791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646836314407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323418157403 + 323418157404.

It is an arithmetic number, because the mean of its divisors is an integer number (323418157404).

Almost surely, 2^646836314807 is an apocalyptic number.

646836314807 is a deficient number, since it is larger than the sum of its proper divisors (1).

646836314807 is an equidigital number, since it uses as much as digits as its factorization.

646836314807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13934592, while the sum is 56.

The spelling of 646836314807 in words is "six hundred forty-six billion, eight hundred thirty-six million, three hundred fourteen thousand, eight hundred seven".