120404510256 has 80 divisors (see below), whose sum is σ = 322330485600. Its totient is φ = 38683459584.

The previous prime is 120404510243. The next prime is 120404510273. The reversal of 120404510256 is 652015404021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 728230 + ... + 878138.

It is an arithmetic number, because the mean of its divisors is an integer number (4029131070).

Almost surely, 2^120404510256 is an apocalyptic number.

120404510256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120404510256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161165242800).

120404510256 is an abundant number, since it is smaller than the sum of its proper divisors (201925975344).

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

120404510256 is a wasteful number, since it uses less digits than its factorization.

120404510256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150526 (or 150520 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 120404510256 its reverse (652015404021), we get a palindrome (772419914277).

The spelling of 120404510256 in words is "one hundred twenty billion, four hundred four million, five hundred ten thousand, two hundred fifty-six".