2168504400479 has 4 divisors (see below), whose sum is σ = 2168540552376. Its totient is φ = 2168468248584.

The previous prime is 2168504400463. The next prime is 2168504400481. The reversal of 2168504400479 is 9740044058612.

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

It is a cyclic number.

It is not a de Polignac number, because 2168504400479 - 2⁴ = 2168504400463 is a prime.

It is a super-2 number, since 2×2168504400479² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168504400779) 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, 17985824 + ... + 18105989.

It is an arithmetic number, because the mean of its divisors is an integer number (542135138094).

Almost surely, 2^{2168504400479} is an apocalyptic number.

2168504400479 is a deficient number, since it is larger than the sum of its proper divisors (36151897).

2168504400479 is an equidigital number, since it uses as much as digits as its factorization.

2168504400479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36151896.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 2168504400479 in words is "two trillion, one hundred sixty-eight billion, five hundred four million, four hundred thousand, four hundred seventy-nine".