8405068644 has 36 divisors (see below), whose sum is σ = 24281310144. Its totient is φ = 2401448112.

The previous prime is 8405068619. The next prime is 8405068649. The reversal of 8405068644 is 4468605048.

8405068644 is a `hidden beast` number, since 84 + 0 + 506 + 8 + 64 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 8405068644.

It is not an unprimeable number, because it can be changed into a prime (8405068649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16676472 + ... + 16676975.

Almost surely, 2^8405068644 is an apocalyptic number.

8405068644 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

8405068644 is an abundant number, since it is smaller than the sum of its proper divisors (15876241500).

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

8405068644 is a wasteful number, since it uses less digits than its factorization.

8405068644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33353464 (or 33353459 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The square root of 8405068644 is about 91679.1614490447. The cubic root of 8405068644 is about 2033.2015005691.

The spelling of 8405068644 in words is "eight billion, four hundred five million, sixty-eight thousand, six hundred forty-four".