816065980507680 has 192 divisors, whose sum is σ = 2968124515856640. Its totient is φ = 184606383734784.

The previous prime is 816065980507667. The next prime is 816065980507681. The reversal of 816065980507680 is 86705089560618.

It is a super-2 number, since 2×816065980507680² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (816065980507681) 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, 1251616245 + ... + 1252268084.

It is an arithmetic number, because the mean of its divisors is an integer number (15458981853420).

Almost surely, 2^{816065980507680} is an apocalyptic number.

816065980507680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

816065980507680 is an abundant number, since it is smaller than the sum of its proper divisors (2152058535348960).

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

816065980507680 is a wasteful number, since it uses less digits than its factorization.

816065980507680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503884451 (or 2503884443 counting only the distinct ones).

The product of its (nonzero) digits is 174182400, while the sum is 69.

The spelling of 816065980507680 in words is "eight hundred sixteen trillion, sixty-five billion, nine hundred eighty million, five hundred seven thousand, six hundred eighty".