120785819787 has 16 divisors (see below), whose sum is σ = 178962326560. Its totient is φ = 80514712800.

The previous prime is 120785819731. The next prime is 120785819813. The reversal of 120785819787 is 787918587021.

It is not a de Polignac number, because 120785819787 - 2⁷ = 120785819659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120785819387) 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 15 ways as a sum of consecutive naturals, for example, 8764 + ... + 491577.

It is an arithmetic number, because the mean of its divisors is an integer number (11185145410).

Almost surely, 2^120785819787 is an apocalyptic number.

120785819787 is a deficient number, since it is larger than the sum of its proper divisors (58176506773).

120785819787 is an equidigital number, since it uses as much as digits as its factorization.

120785819787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509291 (or 509285 counting only the distinct ones).

The product of its (nonzero) digits is 15805440, while the sum is 63.

The spelling of 120785819787 in words is "one hundred twenty billion, seven hundred eighty-five million, eight hundred nineteen thousand, seven hundred eighty-seven".