120990117784 has 64 divisors (see below), whose sum is σ = 252987840000. Its totient is φ = 53908996608.

The previous prime is 120990117779. The next prime is 120990117799. The reversal of 120990117784 is 487711099021.

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 15 ways as a sum of consecutive naturals, for example, 4842877 + ... + 4867795.

It is an arithmetic number, because the mean of its divisors is an integer number (3952935000).

Almost surely, 2^120990117784 is an apocalyptic number.

It is an amenable number.

120990117784 is an abundant number, since it is smaller than the sum of its proper divisors (131997722216).

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

120990117784 is a wasteful number, since it uses less digits than its factorization.

120990117784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26840 (or 26836 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 49.

The spelling of 120990117784 in words is "one hundred twenty billion, nine hundred ninety million, one hundred seventeen thousand, seven hundred eighty-four".