9977788563840 has 192 divisors, whose sum is σ = 35952575574240. Its totient is φ = 2545059078144.

The previous prime is 9977788563829. The next prime is 9977788563859. The reversal of 9977788563840 is 483658877799.

9977788563840 is a `hidden beast` number, since 9 + 9 + 7 + 7 + 7 + 8 + 8 + 563 + 8 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a self number, because there is not a number n which added to its sum of digits gives 9977788563840.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37525237 + ... + 37790196.

Almost surely, 2^{9977788563840} is an apocalyptic number.

9977788563840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9977788563840 is an abundant number, since it is smaller than the sum of its proper divisors (25974787010400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9977788563840 is a wasteful number, since it uses less digits than its factorization.

9977788563840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75315481 (or 75315466 counting only the distinct ones).

The product of its (nonzero) digits is 5120962560, while the sum is 81.

The spelling of 9977788563840 in words is "nine trillion, nine hundred seventy-seven billion, seven hundred eighty-eight million, five hundred sixty-three thousand, eight hundred forty".