6446403331608 has 32 divisors (see below), whose sum is σ = 16635879567360. Its totient is φ = 2079484945440.

The previous prime is 6446403331573. The next prime is 6446403331681. The reversal of 6446403331608 is 8061333046446.

It is a super-2 number, since 2×6446403331608² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4332259560 + ... + 4332261047.

It is an arithmetic number, because the mean of its divisors is an integer number (519871236480).

Almost surely, 2^{6446403331608} is an apocalyptic number.

It is an amenable number.

6446403331608 is an abundant number, since it is smaller than the sum of its proper divisors (10189476235752).

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

6446403331608 is a wasteful number, since it uses less digits than its factorization.

6446403331608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8664520647 (or 8664520643 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 48.

The spelling of 6446403331608 in words is "six trillion, four hundred forty-six billion, four hundred three million, three hundred thirty-one thousand, six hundred eight".