405006633506 has 8 divisors (see below), whose sum is σ = 643245829740. Its totient is φ = 190591356928.

The previous prime is 405006633497. The next prime is 405006633529. The reversal of 405006633506 is 605336600504.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 391762076281 + 13244557225 = 625909^2 + 115085^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 405006633506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5955979871 + ... + 5955979938.

Almost surely, 2^405006633506 is an apocalyptic number.

405006633506 is a deficient number, since it is larger than the sum of its proper divisors (238239196234).

405006633506 is a wasteful number, since it uses less digits than its factorization.

405006633506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11911959828.

The product of its (nonzero) digits is 194400, while the sum is 38.

The spelling of 405006633506 in words is "four hundred five billion, six million, six hundred thirty-three thousand, five hundred six".