9977765216 has 24 divisors (see below), whose sum is σ = 19716767280. Its totient is φ = 4970332288.

The previous prime is 9977765209. The next prime is 9977765233. The reversal of 9977765216 is 6125677799.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570956 + ... + 588171.

It is an arithmetic number, because the mean of its divisors is an integer number (821531970).

Almost surely, 2^9977765216 is an apocalyptic number.

It is an amenable number.

9977765216 is a deficient number, since it is larger than the sum of its proper divisors (9739002064).

9977765216 is a wasteful number, since it uses less digits than its factorization.

9977765216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159406 (or 1159398 counting only the distinct ones).

The product of its digits is 10001880, while the sum is 59.

The square root of 9977765216 is about 99888.7642129985. The cubic root of 9977765216 is about 2152.8367254336.

The spelling of 9977765216 in words is "nine billion, nine hundred seventy-seven million, seven hundred sixty-five thousand, two hundred sixteen".