405504376661 has 8 divisors (see below), whose sum is σ = 406485776448. Its totient is φ = 404523756000.

The previous prime is 405504376619. The next prime is 405504376681. The reversal of 405504376661 is 166673405504.

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 405504376661 - 2¹⁰ = 405504375637 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 (405504376681) 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, 854216 + ... + 1241246.

It is an arithmetic number, because the mean of its divisors is an integer number (50810722056).

Almost surely, 2^405504376661 is an apocalyptic number.

It is an amenable number.

405504376661 is a deficient number, since it is larger than the sum of its proper divisors (981399787).

405504376661 is a wasteful number, since it uses less digits than its factorization.

405504376661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389563.

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 405504376661 in words is "four hundred five billion, five hundred four million, three hundred seventy-six thousand, six hundred sixty-one".