408291661323 has 96 divisors (see below), whose sum is σ = 744211278720. Its totient is φ = 209924628480.

The previous prime is 408291661321. The next prime is 408291661339. The reversal of 408291661323 is 323166192804.

408291661323 is a `hidden beast` number, since 4 + 0 + 8 + 2 + 9 + 1 + 6 + 613 + 23 = 666.

It is not a de Polignac number, because 408291661323 - 2¹ = 408291661321 is a prime.

It is a super-2 number, since 2×408291661323² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (408291661321) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 43278615 + ... + 43288047.

It is an arithmetic number, because the mean of its divisors is an integer number (7752200820).

Almost surely, 2^408291661323 is an apocalyptic number.

408291661323 is a deficient number, since it is larger than the sum of its proper divisors (335919617397).

408291661323 is a wasteful number, since it uses less digits than its factorization.

408291661323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10789 (or 10786 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 408291661323 in words is "four hundred eight billion, two hundred ninety-one million, six hundred sixty-one thousand, three hundred twenty-three".