816563450 has 24 divisors (see below), whose sum is σ = 1523072160. Its totient is φ = 325708400.

The previous prime is 816563441. The next prime is 816563509. The reversal of 816563450 is 54365618.

It is a super-3 number, since 3×816563450³ (a number of 28 digits) contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4796 + ... + 40695.

It is an arithmetic number, because the mean of its divisors is an integer number (63461340).

Almost surely, 2^816563450 is an apocalyptic number.

816563450 is a deficient number, since it is larger than the sum of its proper divisors (706508710).

816563450 is a wasteful number, since it uses less digits than its factorization.

816563450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45862 (or 45857 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 816563450 is about 28575.5743599319. The cubic root of 816563450 is about 934.6807798140.

The spelling of 816563450 in words is "eight hundred sixteen million, five hundred sixty-three thousand, four hundred fifty".