120606642440 has 64 divisors (see below), whose sum is σ = 274891795200. Its totient is φ = 47616072192.

The previous prime is 120606642439. The next prime is 120606642461. The reversal of 120606642440 is 44246606021.

It is a self number, because there is not a number n which added to its sum of digits gives 120606642440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15141899 + ... + 15149861.

It is an arithmetic number, because the mean of its divisors is an integer number (4295184300).

Almost surely, 2^120606642440 is an apocalyptic number.

120606642440 is a gapful number since it is divisible by the number (10) 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 120606642440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137445897600).

120606642440 is an abundant number, since it is smaller than the sum of its proper divisors (154285152760).

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

120606642440 is a wasteful number, since it uses less digits than its factorization.

120606642440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12846 (or 12842 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The spelling of 120606642440 in words is "one hundred twenty billion, six hundred six million, six hundred forty-two thousand, four hundred forty".