128895981184 has 32 divisors (see below), whose sum is σ = 257084813700. Its totient is φ = 64372733952.

The previous prime is 128895981167. The next prime is 128895981223. The reversal of 128895981184 is 481189598821.

It can be written as a sum of positive squares in 2 ways, for example, as 103400833600 + 25495147584 = 321560^2 + 159672^2 .

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

It is a super-2 number, since 2×128895981184² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

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, 477819 + ... + 697210.

Almost surely, 2^128895981184 is an apocalyptic number.

It is an amenable number.

128895981184 is a deficient number, since it is larger than the sum of its proper divisors (128188832516).

128895981184 is an equidigital number, since it uses as much as digits as its factorization.

128895981184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175900 (or 1175888 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 64.

The spelling of 128895981184 in words is "one hundred twenty-eight billion, eight hundred ninety-five million, nine hundred eighty-one thousand, one hundred eighty-four".