501320816 has 20 divisors (see below), whose sum is σ = 978961152. Its totient is φ = 248685696.

The previous prime is 501320779. The next prime is 501320839. The reversal of 501320816 is 618023105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121325 + ... + 125388.

Almost surely, 2^501320816 is an apocalyptic number.

It is an amenable number.

501320816 is a deficient number, since it is larger than the sum of its proper divisors (477640336).

501320816 is a wasteful number, since it uses less digits than its factorization.

501320816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246848 (or 246842 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 501320816 is about 22390.1946396185. The cubic root of 501320816 is about 794.3987997198.

The spelling of 501320816 in words is "five hundred one million, three hundred twenty thousand, eight hundred sixteen".