816297432529 has 2 divisors, whose sum is σ = 816297432530. Its totient is φ = 816297432528.

The previous prime is 816297432451. The next prime is 816297432551. The reversal of 816297432529 is 925234792618.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 742609615504 + 73687817025 = 861748^2 + 271455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816297432529 is a prime.

It is not a weakly prime, because it can be changed into another prime (816297432029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408148716264 + 408148716265.

It is an arithmetic number, because the mean of its divisors is an integer number (408148716265).

Almost surely, 2^816297432529 is an apocalyptic number.

It is an amenable number.

816297432529 is a deficient number, since it is larger than the sum of its proper divisors (1).

816297432529 is an equidigital number, since it uses as much as digits as its factorization.

816297432529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 58.

The spelling of 816297432529 in words is "eight hundred sixteen billion, two hundred ninety-seven million, four hundred thirty-two thousand, five hundred twenty-nine".