405551043320 has 64 divisors (see below), whose sum is σ = 942043011840. Its totient is φ = 156967833600.

The previous prime is 405551043203. The next prime is 405551043329. The reversal of 405551043320 is 23340155504.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405551043329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13452584 + ... + 13482696.

It is an arithmetic number, because the mean of its divisors is an integer number (14719422060).

Almost surely, 2^405551043320 is an apocalyptic number.

405551043320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405551043320 is an abundant number, since it is smaller than the sum of its proper divisors (536491968520).

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

405551043320 is a wasteful number, since it uses less digits than its factorization.

405551043320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41016 (or 41012 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 405551043320 its reverse (23340155504), we get a palindrome (428891198824).

The spelling of 405551043320 in words is "four hundred five billion, five hundred fifty-one million, forty-three thousand, three hundred twenty".