816504542 has 12 divisors (see below), whose sum is σ = 1424717280. Its totient is φ = 349930476.

The previous prime is 816504457. The next prime is 816504607. The reversal of 816504542 is 245405618.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4165742 + ... + 4165937.

It is an arithmetic number, because the mean of its divisors is an integer number (118726440).

Almost surely, 2^816504542 is an apocalyptic number.

816504542 is a deficient number, since it is larger than the sum of its proper divisors (608212738).

816504542 is a wasteful number, since it uses less digits than its factorization.

816504542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8331695 (or 8331688 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 816504542 is about 28574.5436009046. The cubic root of 816504542 is about 934.6583028918.

The spelling of 816504542 in words is "eight hundred sixteen million, five hundred four thousand, five hundred forty-two".