816532601 has 2 divisors, whose sum is σ = 816532602. Its totient is φ = 816532600.

The previous prime is 816532579. The next prime is 816532643. The reversal of 816532601 is 106235618.

It is a happy number.

816532601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 804289600 + 12243001 = 28360^2 + 3499^2 .

It is a cyclic number.

It is not a de Polignac number, because 816532601 - 2²² = 812338297 is a prime.

It is not a weakly prime, because it can be changed into another prime (816532001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408266300 + 408266301.

It is an arithmetic number, because the mean of its divisors is an integer number (408266301).

Almost surely, 2^816532601 is an apocalyptic number.

It is an amenable number.

816532601 is a deficient number, since it is larger than the sum of its proper divisors (1).

816532601 is an equidigital number, since it uses as much as digits as its factorization.

816532601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 816532601 is about 28575.0345756571. The cubic root of 816532601 is about 934.6690092119.

The spelling of 816532601 in words is "eight hundred sixteen million, five hundred thirty-two thousand, six hundred one".