9877658849 has 2 divisors, whose sum is σ = 9877658850. Its totient is φ = 9877658848.

The previous prime is 9877658831. The next prime is 9877658863. The reversal of 9877658849 is 9488567789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7690413025 + 2187245824 = 87695^2 + 46768^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9877658849 is a prime.

It is not a weakly prime, because it can be changed into another prime (9877658899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4938829424 + 4938829425.

It is an arithmetic number, because the mean of its divisors is an integer number (4938829425).

Almost surely, 2^9877658849 is an apocalyptic number.

It is an amenable number.

9877658849 is a deficient number, since it is larger than the sum of its proper divisors (1).

9877658849 is an equidigital number, since it uses as much as digits as its factorization.

9877658849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243855360, while the sum is 71.

The square root of 9877658849 is about 99386.4117925584. The cubic root of 9877658849 is about 2145.6127480785.

The spelling of 9877658849 in words is "nine billion, eight hundred seventy-seven million, six hundred fifty-eight thousand, eight hundred forty-nine".