9919772982840 has 256 divisors, whose sum is σ = 34056331545600. Its totient is φ = 2264333930496.

The previous prime is 9919772982817. The next prime is 9919772982857. The reversal of 9919772982840 is 482892779199.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 3634946596 + ... + 3634949324.

It is an arithmetic number, because the mean of its divisors is an integer number (133032545100).

Almost surely, 2^{9919772982840} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9919772982840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17028165772800).

9919772982840 is an abundant number, since it is smaller than the sum of its proper divisors (24136558562760).

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

9919772982840 is a wasteful number, since it uses less digits than its factorization.

9919772982840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6974 (or 6970 counting only the distinct ones).

The product of its (nonzero) digits is 329204736, while the sum is 75.

The spelling of 9919772982840 in words is "nine trillion, nine hundred nineteen billion, seven hundred seventy-two million, nine hundred eighty-two thousand, eight hundred forty".