128185468071 has 32 divisors (see below), whose sum is σ = 179837425152. Its totient is φ = 81123248640.

The previous prime is 128185468063. The next prime is 128185468079. The reversal of 128185468071 is 170864581821.

It is an interprime number because it is at equal distance from previous prime (128185468063) and next prime (128185468079).

It is not a de Polignac number, because 128185468071 - 2³ = 128185468063 is a prime.

It is a super-2 number, since 2×128185468071² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128185468079) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1344931 + ... + 1437083.

It is an arithmetic number, because the mean of its divisors is an integer number (5619919536).

Almost surely, 2^128185468071 is an apocalyptic number.

128185468071 is a deficient number, since it is larger than the sum of its proper divisors (51651957081).

128185468071 is a wasteful number, since it uses less digits than its factorization.

128185468071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92503.

The product of its (nonzero) digits is 860160, while the sum is 51.

The spelling of 128185468071 in words is "one hundred twenty-eight billion, one hundred eighty-five million, four hundred sixty-eight thousand, seventy-one".