646882015883 has 2 divisors, whose sum is σ = 646882015884. Its totient is φ = 646882015882.

The previous prime is 646882015877. The next prime is 646882015903. The reversal of 646882015883 is 388510288646.

It is a happy number.

646882015883 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646882015883 is a prime.

It is not a weakly prime, because it can be changed into another prime (646882015823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323441007941 + 323441007942.

It is an arithmetic number, because the mean of its divisors is an integer number (323441007942).

Almost surely, 2^646882015883 is an apocalyptic number.

646882015883 is a deficient number, since it is larger than the sum of its proper divisors (1).

646882015883 is an equidigital number, since it uses as much as digits as its factorization.

646882015883 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17694720, while the sum is 59.

The spelling of 646882015883 in words is "six hundred forty-six billion, eight hundred eighty-two million, fifteen thousand, eight hundred eighty-three".