128257233241886 has 16 divisors (see below), whose sum is σ = 219874626134880. Its totient is φ = 54966114816480.

The previous prime is 128257233241871. The next prime is 128257233241981. The reversal of 128257233241886 is 688142332752821.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105277601 + ... + 106488908.

It is an arithmetic number, because the mean of its divisors is an integer number (13742164133430).

Almost surely, 2^{128257233241886} is an apocalyptic number.

128257233241886 is a deficient number, since it is larger than the sum of its proper divisors (91617392892994).

128257233241886 is a wasteful number, since it uses less digits than its factorization.

128257233241886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211809779.

The product of its digits is 61931520, while the sum is 62.

The spelling of 128257233241886 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-six".