15530112128 has 32 divisors (see below), whose sum is σ = 31056600960. Its totient is φ = 7735514368.

The previous prime is 15530112113. The next prime is 15530112139. The reversal of 15530112128 is 82121103551.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 15530112128.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197000 + ... + 264327.

It is an arithmetic number, because the mean of its divisors is an integer number (970518780).

Almost surely, 2^15530112128 is an apocalyptic number.

It is an amenable number.

15530112128 is a deficient number, since it is larger than the sum of its proper divisors (15526488832).

15530112128 is an equidigital number, since it uses as much as digits as its factorization.

15530112128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461604 (or 461592 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 29.

Adding to 15530112128 its reverse (82121103551), we get a palindrome (97651215679).

The spelling of 15530112128 in words is "fifteen billion, five hundred thirty million, one hundred twelve thousand, one hundred twenty-eight".