849681544 has 8 divisors (see below), whose sum is σ = 1593152910. Its totient is φ = 424840768.

The previous prime is 849681533. The next prime is 849681551. The reversal of 849681544 is 445186948.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 748679044 + 101002500 = 27362^2 + 10050^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53105089 + ... + 53105104.

Almost surely, 2^849681544 is an apocalyptic number.

It is an amenable number.

849681544 is a deficient number, since it is larger than the sum of its proper divisors (743471366).

849681544 is a wasteful number, since it uses less digits than its factorization.

849681544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106210199 (or 106210195 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 49.

The square root of 849681544 is about 29149.2974872466. The cubic root of 849681544 is about 947.1499230939.

The spelling of 849681544 in words is "eight hundred forty-nine million, six hundred eighty-one thousand, five hundred forty-four".