816588738020 has 48 divisors (see below), whose sum is σ = 1870861902336. Its totient is φ = 296920512000.

The previous prime is 816588738019. The next prime is 816588738029. The reversal of 816588738020 is 20837885618.

It is a super-2 number, since 2×816588738020² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (816588738029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3203885 + ... + 3449355.

It is an arithmetic number, because the mean of its divisors is an integer number (38976289632).

Almost surely, 2^816588738020 is an apocalyptic number.

It is an amenable number.

816588738020 is an abundant number, since it is smaller than the sum of its proper divisors (1054273164316).

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

816588738020 is a wasteful number, since it uses less digits than its factorization.

816588738020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260612 (or 260610 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 56.

The spelling of 816588738020 in words is "eight hundred sixteen billion, five hundred eighty-eight million, seven hundred thirty-eight thousand, twenty".