645476428859 has 2 divisors, whose sum is σ = 645476428860. Its totient is φ = 645476428858.

The previous prime is 645476428763. The next prime is 645476428901. The reversal of 645476428859 is 958824674546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645476428859 - 2²⁰ = 645475380283 is a prime.

It is not a weakly prime, because it can be changed into another prime (645476428159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322738214429 + 322738214430.

It is an arithmetic number, because the mean of its divisors is an integer number (322738214430).

Almost surely, 2^645476428859 is an apocalyptic number.

645476428859 is a deficient number, since it is larger than the sum of its proper divisors (1).

645476428859 is an equidigital number, since it uses as much as digits as its factorization.

645476428859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 464486400, while the sum is 68.

The spelling of 645476428859 in words is "six hundred forty-five billion, four hundred seventy-six million, four hundred twenty-eight thousand, eight hundred fifty-nine".