646880795527 has 2 divisors, whose sum is σ = 646880795528. Its totient is φ = 646880795526.

The previous prime is 646880795497. The next prime is 646880795569. The reversal of 646880795527 is 725597088646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646880795527 - 2¹¹ = 646880793479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646880793527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323440397763 + 323440397764.

It is an arithmetic number, because the mean of its divisors is an integer number (323440397764).

Almost surely, 2^646880795527 is an apocalyptic number.

646880795527 is a deficient number, since it is larger than the sum of its proper divisors (1).

646880795527 is an equidigital number, since it uses as much as digits as its factorization.

646880795527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 203212800, while the sum is 67.

The spelling of 646880795527 in words is "six hundred forty-six billion, eight hundred eighty million, seven hundred ninety-five thousand, five hundred twenty-seven".