405505320312 has 64 divisors (see below), whose sum is σ = 1075131187200. Its totient is φ = 127011755520.

The previous prime is 405505320293. The next prime is 405505320379. The reversal of 405505320312 is 213023505504.

It is a self number, because there is not a number n which added to its sum of digits gives 405505320312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550264 + ... + 1055367.

It is an arithmetic number, because the mean of its divisors is an integer number (16798924800).

Almost surely, 2^405505320312 is an apocalyptic number.

It is an amenable number.

405505320312 is an abundant number, since it is smaller than the sum of its proper divisors (669625866888).

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

405505320312 is a wasteful number, since it uses less digits than its factorization.

405505320312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606276 (or 1606272 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 405505320312 its reverse (213023505504), we get a palindrome (618528825816).

The spelling of 405505320312 in words is "four hundred five billion, five hundred five million, three hundred twenty thousand, three hundred twelve".