6446163256 has 16 divisors (see below), whose sum is σ = 13016291400. Its totient is φ = 2975152224.

The previous prime is 6446163221. The next prime is 6446163293. The reversal of 6446163256 is 6523616446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30991066 + ... + 30991273.

Almost surely, 2^6446163256 is an apocalyptic number.

It is an amenable number.

6446163256 is an abundant number, since it is smaller than the sum of its proper divisors (6570128144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6446163256 is a wasteful number, since it uses less digits than its factorization.

6446163256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61982358 (or 61982354 counting only the distinct ones).

The product of its digits is 622080, while the sum is 43.

The square root of 6446163256 is about 80288.0019430052. The cubic root of 6446163256 is about 1861.0888194651.

The spelling of 6446163256 in words is "six billion, four hundred forty-six million, one hundred sixty-three thousand, two hundred fifty-six".