816051580 has 24 divisors (see below), whose sum is σ = 1714304592. Its totient is φ = 326307072.

The previous prime is 816051563. The next prime is 816051583. The reversal of 816051580 is 85150618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816051583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74964 + ... + 85156.

It is an arithmetic number, because the mean of its divisors is an integer number (71429358).

Almost surely, 2^816051580 is an apocalyptic number.

It is an amenable number.

816051580 is an abundant number, since it is smaller than the sum of its proper divisors (898253012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816051580 is a wasteful number, since it uses less digits than its factorization.

816051580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14205 (or 14203 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 816051580 is about 28566.6165304889. The cubic root of 816051580 is about 934.4854346938.

The spelling of 816051580 in words is "eight hundred sixteen million, fifty-one thousand, five hundred eighty".