120287805909 has 16 divisors (see below), whose sum is σ = 162485789760. Its totient is φ = 79144179840.

The previous prime is 120287805839. The next prime is 120287805923. The reversal of 120287805909 is 909508782021.

It is not a de Polignac number, because 120287805909 - 2¹⁵ = 120287773141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120287805949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271927 + ... + 560820.

It is an arithmetic number, because the mean of its divisors is an integer number (10155361860).

Almost surely, 2^120287805909 is an apocalyptic number.

It is an amenable number.

120287805909 is a deficient number, since it is larger than the sum of its proper divisors (42197983851).

120287805909 is an equidigital number, since it uses as much as digits as its factorization.

120287805909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833380.

The product of its (nonzero) digits is 725760, while the sum is 51.

The spelling of 120287805909 in words is "one hundred twenty billion, two hundred eighty-seven million, eight hundred five thousand, nine hundred nine".