1980236878722 has 24 divisors (see below), whose sum is σ = 4294950206976. Its totient is φ = 659396348856.

The previous prime is 1980236878691. The next prime is 1980236878727. The reversal of 1980236878722 is 2278786320891.

1980236878722 is a `hidden beast` number, since 198 + 0 + 2 + 368 + 7 + 87 + 2 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1980236878722.

It is not an unprimeable number, because it can be changed into a prime (1980236878727) 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 11 ways as a sum of consecutive naturals, for example, 56866338 + ... + 56901149.

It is an arithmetic number, because the mean of its divisors is an integer number (178956258624).

Almost surely, 2^{1980236878722} is an apocalyptic number.

1980236878722 is an abundant number, since it is smaller than the sum of its proper divisors (2314713328254).

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

1980236878722 is a wasteful number, since it uses less digits than its factorization.

1980236878722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113768462 (or 113768459 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 63.

The spelling of 1980236878722 in words is "one trillion, nine hundred eighty billion, two hundred thirty-six million, eight hundred seventy-eight thousand, seven hundred twenty-two".