128155819863 has 16 divisors (see below), whose sum is σ = 181058897376. Its totient is φ = 80352368640.

The previous prime is 128155819853. The next prime is 128155819871. The reversal of 128155819863 is 368918551821.

It is not a de Polignac number, because 128155819863 - 2³² = 123860852567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128155819853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 853756 + ... + 992577.

It is an arithmetic number, because the mean of its divisors is an integer number (11316181086).

Almost surely, 2^128155819863 is an apocalyptic number.

128155819863 is a deficient number, since it is larger than the sum of its proper divisors (52903077513).

128155819863 is a wasteful number, since it uses less digits than its factorization.

128155819863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847714.

The product of its digits is 4147200, while the sum is 57.

The spelling of 128155819863 in words is "one hundred twenty-eight billion, one hundred fifty-five million, eight hundred nineteen thousand, eight hundred sixty-three".