128257233241887 has 24 divisors (see below), whose sum is σ = 191616783740928. Its totient is φ = 82582095834000.

The previous prime is 128257233241871. The next prime is 128257233241981. The reversal of 128257233241887 is 788142332752821.

It is a happy number.

128257233241887 is a `hidden beast` number, since 1 + 2 + 8 + 2 + 572 + 33 + 24 + 1 + 8 + 8 + 7 = 666.

It is not a de Polignac number, because 128257233241887 - 2⁴ = 128257233241871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128257233241847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 456821239 + ... + 457101912.

It is an arithmetic number, because the mean of its divisors is an integer number (7984032655872).

Almost surely, 2^{128257233241887} is an apocalyptic number.

128257233241887 is a deficient number, since it is larger than the sum of its proper divisors (63359550499041).

128257233241887 is a wasteful number, since it uses less digits than its factorization.

128257233241887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913923691 (or 913923688 counting only the distinct ones).

The product of its digits is 72253440, while the sum is 63.

The spelling of 128257233241887 in words is "one hundred twenty-eight trillion, two hundred fifty-seven billion, two hundred thirty-three million, two hundred forty-one thousand, eight hundred eighty-seven".