4645644994440 has 256 divisors, whose sum is σ = 16037720064000. Its totient is φ = 1195402279680.

The previous prime is 4645644994363. The next prime is 4645644994469. The reversal of 4645644994440 is 444994465464.

4645644994440 is a `hidden beast` number, since 4 + 6 + 4 + 5 + 64 + 49 + 94 + 440 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2959441 + ... + 4248479.

It is an arithmetic number, because the mean of its divisors is an integer number (62647344000).

Almost surely, 2^{4645644994440} is an apocalyptic number.

4645644994440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4645644994440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8018860032000).

4645644994440 is an abundant number, since it is smaller than the sum of its proper divisors (11392075069560).

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

4645644994440 is a wasteful number, since it uses less digits than its factorization.

4645644994440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289177 (or 1289167 counting only the distinct ones).

The product of its (nonzero) digits is 238878720, while the sum is 63.

The spelling of 4645644994440 in words is "four trillion, six hundred forty-five billion, six hundred forty-four million, nine hundred ninety-four thousand, four hundred forty".