128028637883544 has 64 divisors (see below), whose sum is σ = 334924483724640. Its totient is φ = 40739352376320.

The previous prime is 128028637883527. The next prime is 128028637883623. The reversal of 128028637883544 is 445388736820821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1360107597 + ... + 1360201724.

Almost surely, 2^{128028637883544} is an apocalyptic number.

It is an amenable number.

128028637883544 is an abundant number, since it is smaller than the sum of its proper divisors (206895845841096).

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

128028637883544 is a wasteful number, since it uses less digits than its factorization.

128028637883544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720309420 (or 2720309416 counting only the distinct ones).

The product of its (nonzero) digits is 495452160, while the sum is 69.

The spelling of 128028637883544 in words is "one hundred twenty-eight trillion, twenty-eight billion, six hundred thirty-seven million, eight hundred eighty-three thousand, five hundred forty-four".