9977957811 has 32 divisors (see below), whose sum is σ = 15045638400. Its totient is φ = 6533602560.

The previous prime is 9977957809. The next prime is 9977957839. The reversal of 9977957811 is 1187597799.

It is not a de Polignac number, because 9977957811 - 2¹ = 9977957809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9977957411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2701476 + ... + 2705166.

It is an arithmetic number, because the mean of its divisors is an integer number (470176200).

Almost surely, 2^9977957811 is an apocalyptic number.

9977957811 is a deficient number, since it is larger than the sum of its proper divisors (5067680589).

9977957811 is a wasteful number, since it uses less digits than its factorization.

9977957811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5456 (or 5450 counting only the distinct ones).

The product of its digits is 10001880, while the sum is 63.

The square root of 9977957811 is about 99889.7282557121. The cubic root of 9977957811 is about 2152.8505769963.

The spelling of 9977957811 in words is "nine billion, nine hundred seventy-seven million, nine hundred fifty-seven thousand, eight hundred eleven".