405545121545504 has 12 divisors (see below), whose sum is σ = 798416958042774. Its totient is φ = 202772560772736.

The previous prime is 405545121545477. The next prime is 405545121545513.

405545121545504 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 404947202890000 + 597918655504 = 20123300^2 + 773252^2 .

It is a super-2 number, since 2×405545121545504² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6336642524117 + ... + 6336642524180.

Almost surely, 2^{405545121545504} is an apocalyptic number.

It is an amenable number.

405545121545504 is a deficient number, since it is larger than the sum of its proper divisors (392871836497270).

405545121545504 is a wasteful number, since it uses less digits than its factorization.

405545121545504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12673285048307 (or 12673285048299 counting only the distinct ones).

The product of its (nonzero) digits is 8000000, while the sum is 50.

The spelling of 405545121545504 in words is "four hundred five trillion, five hundred forty-five billion, one hundred twenty-one million, five hundred forty-five thousand, five hundred four".