406452661605 has 12 divisors (see below), whose sum is σ = 704517946860. Its totient is φ = 216774752832.

The previous prime is 406452661583. The next prime is 406452661633. The reversal of 406452661605 is 506166254604.

406452661605 is a `hidden beast` number, since 4 + 0 + 6 + 4 + 5 + 26 + 616 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 323444713284 + 83007948321 = 568722^2 + 288111^2 .

It is not a de Polignac number, because 406452661605 - 2⁹ = 406452661093 is a prime.

It is a super-2 number, since 2×406452661605² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 9032281369 = 406452661605 / (4 + 0 + 6 + 4 + 5 + 2 + 6 + 6 + 1 + 6 + 0 + 5).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4516140640 + ... + 4516140729.

It is an arithmetic number, because the mean of its divisors is an integer number (58709828905).

Almost surely, 2^406452661605 is an apocalyptic number.

406452661605 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

406452661605 is a deficient number, since it is larger than the sum of its proper divisors (298065285255).

406452661605 is a wasteful number, since it uses less digits than its factorization.

406452661605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9032281380 (or 9032281377 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 406452661605 in words is "four hundred six billion, four hundred fifty-two million, six hundred sixty-one thousand, six hundred five".