120644521005 has 16 divisors (see below), whose sum is σ = 197520333120. Its totient is φ = 62847378048.

The previous prime is 120644521003. The next prime is 120644521051. The reversal of 120644521005 is 500125446021.

It is not a de Polignac number, because 120644521005 - 2¹ = 120644521003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120644521003) 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, 93522240 + ... + 93523529.

It is an arithmetic number, because the mean of its divisors is an integer number (12345020820).

Almost surely, 2^120644521005 is an apocalyptic number.

120644521005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120644521005 is a deficient number, since it is larger than the sum of its proper divisors (76875812115).

120644521005 is a wasteful number, since it uses less digits than its factorization.

120644521005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187045820.

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

Adding to 120644521005 its reverse (500125446021), we get a palindrome (620769967026).

The spelling of 120644521005 in words is "one hundred twenty billion, six hundred forty-four million, five hundred twenty-one thousand, five".