816494516 has 24 divisors (see below), whose sum is σ = 1455089160. Its totient is φ = 400780800.

The previous prime is 816494509. The next prime is 816494527. The reversal of 816494516 is 615494618.

It can be written as a sum of positive squares in 4 ways, for example, as 6522916 + 809971600 = 2554^2 + 28460^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135896 + ... + 141776.

It is an arithmetic number, because the mean of its divisors is an integer number (60628715).

Almost surely, 2^816494516 is an apocalyptic number.

It is an amenable number.

816494516 is a deficient number, since it is larger than the sum of its proper divisors (638594644).

816494516 is a wasteful number, since it uses less digits than its factorization.

816494516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6515 (or 6513 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 816494516 is about 28574.3681644932. The cubic root of 816494516 is about 934.6544772660.

The spelling of 816494516 in words is "eight hundred sixteen million, four hundred ninety-four thousand, five hundred sixteen".