9877148981 has 6 divisors (see below), whose sum is σ = 11489744790. Its totient is φ = 8466127656.

The previous prime is 9877148933. The next prime is 9877149011. The reversal of 9877148981 is 1898417789.

9877148981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8415310225 + 1461838756 = 91735^2 + 38234^2 .

It is a de Polignac number, because none of the positive numbers 2^k-9877148981 is a prime.

It is a super-2 number, since 2×9877148981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9877142981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100787186 + ... + 100787283.

It is an arithmetic number, because the mean of its divisors is an integer number (1914957465).

Almost surely, 2^9877148981 is an apocalyptic number.

It is an amenable number.

9877148981 is a deficient number, since it is larger than the sum of its proper divisors (1612595809).

9877148981 is a wasteful number, since it uses less digits than its factorization.

9877148981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201574483 (or 201574476 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 62.

The square root of 9877148981 is about 99383.8466804339. The cubic root of 9877148981 is about 2145.5758298127.

The spelling of 9877148981 in words is "nine billion, eight hundred seventy-seven million, one hundred forty-eight thousand, nine hundred eighty-one".