9977976081 has 24 divisors (see below), whose sum is σ = 15060701760. Its totient is φ = 6353699616.

The previous prime is 9977976053. The next prime is 9977976097. The reversal of 9977976081 is 1806797799.

9977976081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9977976081 - 2⁹ = 9977975569 is a prime.

It is a super-2 number, since 2×9977976081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9977978081) 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 23 ways as a sum of consecutive naturals, for example, 112770 + ... + 180756.

It is an arithmetic number, because the mean of its divisors is an integer number (627529240).

Almost surely, 2^9977976081 is an apocalyptic number.

It is an amenable number.

9977976081 is a deficient number, since it is larger than the sum of its proper divisors (5082725679).

9977976081 is a wasteful number, since it uses less digits than its factorization.

9977976081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68725 (or 68722 counting only the distinct ones).

The product of its (nonzero) digits is 12002256, while the sum is 63.

The square root of 9977976081 is about 99889.8197065146. The cubic root of 9977976081 is about 2152.8518909778.

The spelling of 9977976081 in words is "nine billion, nine hundred seventy-seven million, nine hundred seventy-six thousand, eighty-one".