816057556080 has 160 divisors (see below), whose sum is σ = 2733140067840. Its totient is φ = 200229565440.

The previous prime is 816057556037. The next prime is 816057556081. The reversal of 816057556080 is 80655750618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816057556081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 549811 + ... + 1390829.

It is an arithmetic number, because the mean of its divisors is an integer number (17082125424).

Almost surely, 2^816057556080 is an apocalyptic number.

816057556080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 816057556080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1366570033920).

816057556080 is an abundant number, since it is smaller than the sum of its proper divisors (1917082511760).

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

816057556080 is a wasteful number, since it uses less digits than its factorization.

816057556080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841359 (or 841353 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 51.

The spelling of 816057556080 in words is "eight hundred sixteen billion, fifty-seven million, five hundred fifty-six thousand, eighty".