6446406512 has 80 divisors (see below), whose sum is σ = 16040640000. Its totient is φ = 2439334656.

The previous prime is 6446406509. The next prime is 6446406521. The reversal of 6446406512 is 2156046446.

It is a super-2 number, since 2×6446406512² = 83112313835912012288, which 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 15 ways as a sum of consecutive naturals, for example, 62762 + ... + 129737.

It is an arithmetic number, because the mean of its divisors is an integer number (200508000).

Almost surely, 2^6446406512 is an apocalyptic number.

It is an amenable number.

6446406512 is an abundant number, since it is smaller than the sum of its proper divisors (9594233488).

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

6446406512 is a wasteful number, since it uses less digits than its factorization.

6446406512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192550 (or 192544 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 6446406512 is about 80289.5168250501. The cubic root of 6446406512 is about 1861.1122295313.

The spelling of 6446406512 in words is "six billion, four hundred forty-six million, four hundred six thousand, five hundred twelve".