816927910794 has 24 divisors (see below), whose sum is σ = 1785674287332. Its totient is φ = 269899486080.

The previous prime is 816927910769. The next prime is 816927910853. The reversal of 816927910794 is 497019729618.

It can be written as a sum of positive squares in 2 ways, for example, as 533783666025 + 283144244769 = 730605^2 + 532113^2 .

It is a super-2 number, since 2×816927910794² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200816037 + ... + 200820104.

Almost surely, 2^816927910794 is an apocalyptic number.

816927910794 is an abundant number, since it is smaller than the sum of its proper divisors (968746376538).

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

816927910794 is a wasteful number, since it uses less digits than its factorization.

816927910794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401636262 (or 401636259 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 63.

The spelling of 816927910794 in words is "eight hundred sixteen billion, nine hundred twenty-seven million, nine hundred ten thousand, seven hundred ninety-four".