1634681684 has 12 divisors (see below), whose sum is σ = 2862125364. Its totient is φ = 816931584.

The previous prime is 1634681683. The next prime is 1634681747. The reversal of 1634681684 is 4861864361.

It can be written as a sum of positive squares in 2 ways, for example, as 1140953284 + 493728400 = 33778^2 + 22220^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1634681681) 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, 93239 + ... + 109374.

It is an arithmetic number, because the mean of its divisors is an integer number (238510447).

Almost surely, 2^1634681684 is an apocalyptic number.

It is an amenable number.

1634681684 is a deficient number, since it is larger than the sum of its proper divisors (1227443680).

1634681684 is a wasteful number, since it uses less digits than its factorization.

1634681684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204634 (or 204632 counting only the distinct ones).

The product of its digits is 663552, while the sum is 47.

The square root of 1634681684 is about 40431.1969152534. The cubic root of 1634681684 is about 1177.9975815770.

The spelling of 1634681684 in words is "one billion, six hundred thirty-four million, six hundred eighty-one thousand, six hundred eighty-four".