120405443505 has 32 divisors (see below), whose sum is σ = 199495215360. Its totient is φ = 61938589440.

The previous prime is 120405443497. The next prime is 120405443531. The reversal of 120405443505 is 505344504021.

It is not a de Polignac number, because 120405443505 - 2³ = 120405443497 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 286815 + ... + 568395.

It is an arithmetic number, because the mean of its divisors is an integer number (6234225480).

Almost surely, 2^120405443505 is an apocalyptic number.

120405443505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120405443505 is a deficient number, since it is larger than the sum of its proper divisors (79089771855).

120405443505 is a wasteful number, since it uses less digits than its factorization.

120405443505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282601.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 120405443505 its reverse (505344504021), we get a palindrome (625749947526).

It can be divided in two parts, 12040 and 5443505, that added together give a palindrome (5455545).

The spelling of 120405443505 in words is "one hundred twenty billion, four hundred five million, four hundred forty-three thousand, five hundred five".