400805902909 has 8 divisors (see below), whose sum is σ = 405670003200. Its totient is φ = 395964910656.

The previous prime is 400805902907. The next prime is 400805902919. The reversal of 400805902909 is 909209508004.

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

It is a cyclic number.

It is not a de Polignac number, because 400805902909 - 2¹ = 400805902907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400805902907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5742109 + ... + 5811490.

It is an arithmetic number, because the mean of its divisors is an integer number (50708750400).

Almost surely, 2^400805902909 is an apocalyptic number.

It is an amenable number.

400805902909 is a deficient number, since it is larger than the sum of its proper divisors (4864100291).

400805902909 is a wasteful number, since it uses less digits than its factorization.

400805902909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11554019.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 400805902909 in words is "four hundred billion, eight hundred five million, nine hundred two thousand, nine hundred nine".