9877729168 has 10 divisors (see below), whose sum is σ = 19138100294. Its totient is φ = 4938864576.

The previous prime is 9877729163. The next prime is 9877729187. The reversal of 9877729168 is 8619277789.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5462392464 + 4415336704 = 73908^2 + 66448^2 .

It is not an unprimeable number, because it can be changed into a prime (9877729163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308679021 + ... + 308679052.

Almost surely, 2^9877729168 is an apocalyptic number.

It is an amenable number.

9877729168 is a deficient number, since it is larger than the sum of its proper divisors (9260371126).

9877729168 is a wasteful number, since it uses less digits than its factorization.

9877729168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617358081 (or 617358075 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 64.

The square root of 9877729168 is about 99386.7655575932. The cubic root of 9877729168 is about 2145.6178396016.

The spelling of 9877729168 in words is "nine billion, eight hundred seventy-seven million, seven hundred twenty-nine thousand, one hundred sixty-eight".