816261843 has 8 divisors (see below), whose sum is σ = 1089075456. Its totient is φ = 543811400.

The previous prime is 816261833. The next prime is 816261863. The reversal of 816261843 is 348162618.

816261843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 816261843 - 2⁶ = 816261779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816261833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85503 + ... + 94568.

It is an arithmetic number, because the mean of its divisors is an integer number (136134432).

Almost surely, 2^816261843 is an apocalyptic number.

816261843 is a deficient number, since it is larger than the sum of its proper divisors (272813613).

816261843 is a wasteful number, since it uses less digits than its factorization.

816261843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181585.

The product of its digits is 55296, while the sum is 39.

The square root of 816261843 is about 28570.2965157872. The cubic root of 816261843 is about 934.5656873161.

The spelling of 816261843 in words is "eight hundred sixteen million, two hundred sixty-one thousand, eight hundred forty-three".