128481392187776 has 32 divisors (see below), whose sum is σ = 256044315508680. Its totient is φ = 64219289472000.

The previous prime is 128481392187737. The next prime is 128481392187787. The reversal of 128481392187776 is 677781293184821.

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

It is a congruent number.

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, 166853606 + ... + 167621861.

Almost surely, 2^{128481392187776} is an apocalyptic number.

128481392187776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128481392187776 is a deficient number, since it is larger than the sum of its proper divisors (127562923320904).

128481392187776 is an equidigital number, since it uses as much as digits as its factorization.

128481392187776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334478482 (or 334478470 counting only the distinct ones).

The product of its digits is 455196672, while the sum is 74.

The spelling of 128481392187776 in words is "one hundred twenty-eight trillion, four hundred eighty-one billion, three hundred ninety-two million, one hundred eighty-seven thousand, seven hundred seventy-six".