128507994448 has 40 divisors (see below), whose sum is σ = 255129045696. Its totient is φ = 62669126400.

The previous prime is 128507994371. The next prime is 128507994469. The reversal of 128507994448 is 844499705821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2469013 + ... + 2520523.

Almost surely, 2^128507994448 is an apocalyptic number.

It is an amenable number.

128507994448 is a deficient number, since it is larger than the sum of its proper divisors (126621051248).

128507994448 is a wasteful number, since it uses less digits than its factorization.

128507994448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55363 (or 55357 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 61.

The spelling of 128507994448 in words is "one hundred twenty-eight billion, five hundred seven million, nine hundred ninety-four thousand, four hundred forty-eight".