405617740644 has 24 divisors (see below), whose sum is σ = 946709683360. Its totient is φ = 135167586624.

The previous prime is 405617740639. The next prime is 405617740669. The reversal of 405617740644 is 446047716504.

405617740644 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 405617740593 and 405617740602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4746754 + ... + 4831449.

Almost surely, 2^405617740644 is an apocalyptic number.

It is an amenable number.

405617740644 is an abundant number, since it is smaller than the sum of its proper divisors (541091942716).

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

405617740644 is a wasteful number, since it uses less digits than its factorization.

405617740644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9581739 (or 9581737 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 48.

The spelling of 405617740644 in words is "four hundred five billion, six hundred seventeen million, seven hundred forty thousand, six hundred forty-four".