816563342 has 72 divisors (see below), whose sum is σ = 1569745800. Its totient is φ = 316739808.

The previous prime is 816563311. The next prime is 816563347. The reversal of 816563342 is 243365618.

It is a super-3 number, since 3×816563342³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 816563296 and 816563305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816563347) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 984584 + ... + 985412.

It is an arithmetic number, because the mean of its divisors is an integer number (21802025).

Almost surely, 2^816563342 is an apocalyptic number.

816563342 is a deficient number, since it is larger than the sum of its proper divisors (753182458).

816563342 is a wasteful number, since it uses less digits than its factorization.

816563342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 880 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 816563342 is about 28575.5724702061. The cubic root of 816563342 is about 934.6807386066.

The spelling of 816563342 in words is "eight hundred sixteen million, five hundred sixty-three thousand, three hundred forty-two".