128488965988 has 24 divisors (see below), whose sum is σ = 225188006400. Its totient is φ = 64149609888.

The previous prime is 128488965961. The next prime is 128488966003. The reversal of 128488965988 is 889569884821.

It is a super-2 number, since 2×128488965988² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8187133 + ... + 8202811.

It is an arithmetic number, because the mean of its divisors is an integer number (9382833600).

Almost surely, 2^128488965988 is an apocalyptic number.

It is an amenable number.

128488965988 is a deficient number, since it is larger than the sum of its proper divisors (96699040412).

128488965988 is a wasteful number, since it uses less digits than its factorization.

128488965988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18579 (or 18577 counting only the distinct ones).

The product of its digits is 637009920, while the sum is 76.

The spelling of 128488965988 in words is "one hundred twenty-eight billion, four hundred eighty-eight million, nine hundred sixty-five thousand, nine hundred eighty-eight".