6446899630 has 32 divisors (see below), whose sum is σ = 12354975360. Its totient is φ = 2413647360.

The previous prime is 6446899597. The next prime is 6446899637. The reversal of 6446899630 is 369986446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446899637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73990 + ... + 135529.

It is an arithmetic number, because the mean of its divisors is an integer number (386092980).

Almost surely, 2^6446899630 is an apocalyptic number.

6446899630 is a deficient number, since it is larger than the sum of its proper divisors (5908075730).

6446899630 is a wasteful number, since it uses less digits than its factorization.

6446899630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209724.

The product of its (nonzero) digits is 6718464, while the sum is 55.

The square root of 6446899630 is about 80292.5876404541. The cubic root of 6446899630 is about 1861.1596835942.

The spelling of 6446899630 in words is "six billion, four hundred forty-six million, eight hundred ninety-nine thousand, six hundred thirty".