404450323513 has 4 divisors (see below), whose sum is σ = 404539867620. Its totient is φ = 404360779408.

The previous prime is 404450323493. The next prime is 404450323523. The reversal of 404450323513 is 315323054404.

It is a happy number.

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 179007686649 + 225442636864 = 423093^2 + 474808^2 .

It is a cyclic number.

It is not a de Polignac number, because 404450323513 - 2¹⁷ = 404450192441 is a prime.

It is a super-2 number, since 2×404450323513² (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 (404450323523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44765278 + ... + 44774311.

It is an arithmetic number, because the mean of its divisors is an integer number (101134966905).

Almost surely, 2^404450323513 is an apocalyptic number.

It is an amenable number.

404450323513 is a deficient number, since it is larger than the sum of its proper divisors (89544107).

404450323513 is an equidigital number, since it uses as much as digits as its factorization.

404450323513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89544106.

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 404450323513 its reverse (315323054404), we get a palindrome (719773377917).

The spelling of 404450323513 in words is "four hundred four billion, four hundred fifty million, three hundred twenty-three thousand, five hundred thirteen".