816265642 has 8 divisors (see below), whose sum is σ = 1296421956. Its totient is φ = 384124992.

The previous prime is 816265577. The next prime is 816265643. The reversal of 816265642 is 246562618.

816265642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 658486921 + 157778721 = 25661^2 + 12561^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 816265595 and 816265604.

It is not an unprimeable number, because it can be changed into a prime (816265643) 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, 12003873 + ... + 12003940.

Almost surely, 2^816265642 is an apocalyptic number.

816265642 is a deficient number, since it is larger than the sum of its proper divisors (480156314).

816265642 is a wasteful number, since it uses less digits than its factorization.

816265642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24007832.

The product of its digits is 138240, while the sum is 40.

The square root of 816265642 is about 28570.3630008441. The cubic root of 816265642 is about 934.5671371816.

The spelling of 816265642 in words is "eight hundred sixteen million, two hundred sixty-five thousand, six hundred forty-two".