405512032040 has 16 divisors (see below), whose sum is σ = 912402072180. Its totient is φ = 162204812800.

The previous prime is 405512032007. The next prime is 405512032097. The reversal of 405512032040 is 40230215504.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 377312890564 + 28199141476 = 614258^2 + 167926^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5068900361 + ... + 5068900440.

Almost surely, 2^405512032040 is an apocalyptic number.

405512032040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405512032040 is an abundant number, since it is smaller than the sum of its proper divisors (506890040140).

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

405512032040 is a wasteful number, since it uses less digits than its factorization.

405512032040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10137800812 (or 10137800808 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 405512032040 its reverse (40230215504), we get a palindrome (445742247544).

The spelling of 405512032040 in words is "four hundred five billion, five hundred twelve million, thirty-two thousand, forty".