816339651 has 8 divisors (see below), whose sum is σ = 1089005904. Its totient is φ = 543949920.

The previous prime is 816339631. The next prime is 816339653. The reversal of 816339651 is 156933618.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 816339651 - 2²⁵ = 782785219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816339653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62140 + ... + 74121.

It is an arithmetic number, because the mean of its divisors is an integer number (136125738).

Almost surely, 2^816339651 is an apocalyptic number.

816339651 is a deficient number, since it is larger than the sum of its proper divisors (272666253).

816339651 is a wasteful number, since it uses less digits than its factorization.

816339651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138261.

The product of its digits is 116640, while the sum is 42.

The square root of 816339651 is about 28571.6581772917. The cubic root of 816339651 is about 934.5953813729.

The spelling of 816339651 in words is "eight hundred sixteen million, three hundred thirty-nine thousand, six hundred fifty-one".