817135682890 has 16 divisors (see below), whose sum is σ = 1473117570432. Its totient is φ = 326349086224.

The previous prime is 817135682873. The next prime is 817135682897. The reversal of 817135682890 is 98286531718.

It is a super-3 number, since 3×817135682890³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (817135682897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63141574 + ... + 63154513.

It is an arithmetic number, because the mean of its divisors is an integer number (92069848152).

Almost surely, 2^817135682890 is an apocalyptic number.

817135682890 is a deficient number, since it is larger than the sum of its proper divisors (655981887542).

817135682890 is a wasteful number, since it uses less digits than its factorization.

817135682890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126296741.

The product of its (nonzero) digits is 5806080, while the sum is 58.

The spelling of 817135682890 in words is "eight hundred seventeen billion, one hundred thirty-five million, six hundred eighty-two thousand, eight hundred ninety".