405679388636 has 12 divisors (see below), whose sum is σ = 710028275040. Its totient is φ = 202814167200.

The previous prime is 405679388629. The next prime is 405679388651. The reversal of 405679388636 is 636883976504.

It is a congruent number.

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, 6346001 + ... + 6409608.

It is an arithmetic number, because the mean of its divisors is an integer number (59169022920).

Almost surely, 2^405679388636 is an apocalyptic number.

It is an amenable number.

405679388636 is a deficient number, since it is larger than the sum of its proper divisors (304348886404).

405679388636 is a wasteful number, since it uses less digits than its factorization.

405679388636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12763564 (or 12763562 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 65.

The spelling of 405679388636 in words is "four hundred five billion, six hundred seventy-nine million, three hundred eighty-eight thousand, six hundred thirty-six".