128257233241885 has 16 divisors (see below), whose sum is σ = 169108294461120. Its totient is φ = 92606923146240.

The previous prime is 128257233241871. The next prime is 128257233241981. The reversal of 128257233241885 is 588142332752821.

It is not a de Polignac number, because 128257233241885 - 2²¹ = 128257231144733 is a prime.

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, 8388300612 + ... + 8388315901.

It is an arithmetic number, because the mean of its divisors is an integer number (10569268403820).

Almost surely, 2^{128257233241885} is an apocalyptic number.

It is an amenable number.

128257233241885 is a deficient number, since it is larger than the sum of its proper divisors (40851061219235).

128257233241885 is a wasteful number, since it uses less digits than its factorization.

128257233241885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16776616668.

The product of its digits is 51609600, while the sum is 61.

The spelling of 128257233241885 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-five".