405440522412020 has 96 divisors (see below), whose sum is σ = 917694161556480. Its totient is φ = 150116636113920.

The previous prime is 405440522412011. The next prime is 405440522412053. The reversal of 405440522412020 is 20214225044504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103447769 + ... + 107295488.

It is an arithmetic number, because the mean of its divisors is an integer number (9559314182880).

Almost surely, 2^{405440522412020} is an apocalyptic number.

It is an amenable number.

405440522412020 is an abundant number, since it is smaller than the sum of its proper divisors (512253639144460).

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

405440522412020 is a wasteful number, since it uses less digits than its factorization.

405440522412020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210743433 (or 210743431 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 35.

Adding to 405440522412020 its reverse (20214225044504), we get a palindrome (425654747456524).

The spelling of 405440522412020 in words is "four hundred five trillion, four hundred forty billion, five hundred twenty-two million, four hundred twelve thousand, twenty".