816297432451 has 2 divisors, whose sum is σ = 816297432452. Its totient is φ = 816297432450.

The previous prime is 816297432449. The next prime is 816297432529. The reversal of 816297432451 is 154234792618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 816297432451 - 2¹ = 816297432449 is a prime.

Together with 816297432449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (816297432151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408148716225 + 408148716226.

It is an arithmetic number, because the mean of its divisors is an integer number (408148716226).

Almost surely, 2^816297432451 is an apocalyptic number.

816297432451 is a deficient number, since it is larger than the sum of its proper divisors (1).

816297432451 is an equidigital number, since it uses as much as digits as its factorization.

816297432451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 52.

The spelling of 816297432451 in words is "eight hundred sixteen billion, two hundred ninety-seven million, four hundred thirty-two thousand, four hundred fifty-one".