4446563640 has 64 divisors (see below), whose sum is σ = 13416861600. Its totient is φ = 1178890752.

The previous prime is 4446563599. The next prime is 4446563669. The reversal of 4446563640 is 463656444.

It is a junction number, because it is equal to n+sod(n) for n = 4446563592 and 4446563601.

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, 86335 + ... + 127854.

Almost surely, 2^4446563640 is an apocalyptic number.

4446563640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4446563640 is an abundant number, since it is smaller than the sum of its proper divisors (8970297960).

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

4446563640 is a wasteful number, since it uses less digits than its factorization.

4446563640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214376 (or 214372 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 42.

The square root of 4446563640 is about 66682.5587391486. The cubic root of 4446563640 is about 1644.4026606473.

The spelling of 4446563640 in words is "four billion, four hundred forty-six million, five hundred sixty-three thousand, six hundred forty".