646256359 has 8 divisors (see below), whose sum is σ = 743536800. Its totient is φ = 550215456.

The previous prime is 646256341. The next prime is 646256399. The reversal of 646256359 is 953652646.

646256359 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646256359 - 2⁵ = 646256327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646256399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308764 + ... + 310849.

It is an arithmetic number, because the mean of its divisors is an integer number (92942100).

Almost surely, 2^646256359 is an apocalyptic number.

646256359 is a deficient number, since it is larger than the sum of its proper divisors (97280441).

646256359 is a wasteful number, since it uses less digits than its factorization.

646256359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619769.

The product of its digits is 1166400, while the sum is 46.

The square root of 646256359 is about 25421.5727090202. The cubic root of 646256359 is about 864.5728827890.

The spelling of 646256359 in words is "six hundred forty-six million, two hundred fifty-six thousand, three hundred fifty-nine".