405644308620 has 96 divisors (see below), whose sum is σ = 1175810731200. Its totient is φ = 104366997504.

The previous prime is 405644308579. The next prime is 405644308621. The reversal of 405644308620 is 26803446504.

It is not an unprimeable number, because it can be changed into a prime (405644308621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2368932 + ... + 2534388.

It is an arithmetic number, because the mean of its divisors is an integer number (12248028450).

Almost surely, 2^405644308620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 405644308620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (587905365600).

405644308620 is an abundant number, since it is smaller than the sum of its proper divisors (770166422580).

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

405644308620 is a wasteful number, since it uses less digits than its factorization.

405644308620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166907 (or 166905 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 405644308620 in words is "four hundred five billion, six hundred forty-four million, three hundred eight thousand, six hundred twenty".