120658921728 has 72 divisors (see below), whose sum is σ = 321576796800. Its totient is φ = 40163518464.

The previous prime is 120658921723. The next prime is 120658921739. The reversal of 120658921728 is 827129856021.

It is not an unprimeable number, because it can be changed into a prime (120658921723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442938 + ... + 661446.

It is an arithmetic number, because the mean of its divisors is an integer number (4466344400).

Almost surely, 2^120658921728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120658921728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160788398400).

120658921728 is an abundant number, since it is smaller than the sum of its proper divisors (200917875072).

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

120658921728 is an equidigital number, since it uses as much as digits as its factorization.

120658921728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219247 (or 219233 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 120658921728 in words is "one hundred twenty billion, six hundred fifty-eight million, nine hundred twenty-one thousand, seven hundred twenty-eight".