405906386343 has 4 divisors (see below), whose sum is σ = 541208515128. Its totient is φ = 270604257560.

The previous prime is 405906386321. The next prime is 405906386351. The reversal of 405906386343 is 343683609504.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 405906386343 - 2⁵ = 405906386311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405906385343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67651064388 + ... + 67651064393.

It is an arithmetic number, because the mean of its divisors is an integer number (135302128782).

Almost surely, 2^405906386343 is an apocalyptic number.

405906386343 is a deficient number, since it is larger than the sum of its proper divisors (135302128785).

405906386343 is a wasteful number, since it uses less digits than its factorization.

405906386343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135302128784.

The product of its (nonzero) digits is 5598720, while the sum is 51.

The spelling of 405906386343 in words is "four hundred five billion, nine hundred six million, three hundred eighty-six thousand, three hundred forty-three".