916684351685 has 4 divisors (see below), whose sum is σ = 1100021222028. Its totient is φ = 733347481344.

The previous prime is 916684351673. The next prime is 916684351721. The reversal of 916684351685 is 586153486619.

916684351685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586153486619 = 43 ⋅13631476433.

It can be written as a sum of positive squares in 2 ways, for example, as 288280938724 + 628403412961 = 536918^2 + 792719^2 .

It is a cyclic number.

It is not a de Polignac number, because 916684351685 - 2²² = 916680157381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91668435164 + ... + 91668435173.

It is an arithmetic number, because the mean of its divisors is an integer number (275005305507).

Almost surely, 2^916684351685 is an apocalyptic number.

It is an amenable number.

916684351685 is a deficient number, since it is larger than the sum of its proper divisors (183336870343).

916684351685 is a wasteful number, since it uses less digits than its factorization.

916684351685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183336870342.

The product of its digits is 37324800, while the sum is 62.

The spelling of 916684351685 in words is "nine hundred sixteen billion, six hundred eighty-four million, three hundred fifty-one thousand, six hundred eighty-five".