634850084689 has 4 divisors (see below), whose sum is σ = 652008195124. Its totient is φ = 617691974256.

The previous prime is 634850084647. The next prime is 634850084749. The reversal of 634850084689 is 986480058436.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 466017849025 + 168832235664 = 682655^2 + 410892^2 .

It is a cyclic number.

It is not a de Polignac number, because 634850084689 - 2³⁹ = 85094270801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634850084629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8579055162 + ... + 8579055235.

It is an arithmetic number, because the mean of its divisors is an integer number (163002048781).

Almost surely, 2^634850084689 is an apocalyptic number.

It is an amenable number.

634850084689 is a deficient number, since it is larger than the sum of its proper divisors (17158110435).

634850084689 is a wasteful number, since it uses less digits than its factorization.

634850084689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17158110434.

The product of its (nonzero) digits is 39813120, while the sum is 61.

The spelling of 634850084689 in words is "six hundred thirty-four billion, eight hundred fifty million, eighty-four thousand, six hundred eighty-nine".