408399275969 has 4 divisors (see below), whose sum is σ = 408468725700. Its totient is φ = 408329826240.

The previous prime is 408399275939. The next prime is 408399275989. The reversal of 408399275969 is 969572993804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 197768762944 + 210630513025 = 444712^2 + 458945^2 .

It is a cyclic number.

It is not a de Polignac number, because 408399275969 - 2¹² = 408399271873 is a prime.

It is a super-2 number, since 2×408399275969² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408399275929) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 34716044 + ... + 34727805.

It is an arithmetic number, because the mean of its divisors is an integer number (102117181425).

Almost surely, 2^408399275969 is an apocalyptic number.

It is an amenable number.

408399275969 is a deficient number, since it is larger than the sum of its proper divisors (69449731).

408399275969 is an equidigital number, since it uses as much as digits as its factorization.

408399275969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69449730.

The product of its (nonzero) digits is 264539520, while the sum is 71.

The spelling of 408399275969 in words is "four hundred eight billion, three hundred ninety-nine million, two hundred seventy-five thousand, nine hundred sixty-nine".