816297432479 has 4 divisors (see below), whose sum is σ = 817153988976. Its totient is φ = 815440875984.

The previous prime is 816297432451. The next prime is 816297432529. The reversal of 816297432479 is 974234792618.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816297432479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816297432449) 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, 428276819 + ... + 428278724.

It is an arithmetic number, because the mean of its divisors is an integer number (204288497244).

Almost surely, 2^816297432479 is an apocalyptic number.

816297432479 is a deficient number, since it is larger than the sum of its proper divisors (856556497).

816297432479 is an equidigital number, since it uses as much as digits as its factorization.

816297432479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856556496.

The product of its digits is 36578304, while the sum is 62.

The spelling of 816297432479 in words is "eight hundred sixteen billion, two hundred ninety-seven million, four hundred thirty-two thousand, four hundred seventy-nine".