128431678686 has 16 divisors (see below), whose sum is σ = 256998075264. Its totient is φ = 42788106584.

The previous prime is 128431678681. The next prime is 128431678691. The reversal of 128431678686 is 686876134821.

It is an interprime number because it is at equal distance from previous prime (128431678681) and next prime (128431678691).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128431678681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5600850 + ... + 5623733.

It is an arithmetic number, because the mean of its divisors is an integer number (16062379704).

Almost surely, 2^128431678686 is an apocalyptic number.

128431678686 is an abundant number, since it is smaller than the sum of its proper divisors (128566396578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128431678686 is a wasteful number, since it uses less digits than its factorization.

128431678686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11226495.

The product of its digits is 18579456, while the sum is 60.

The spelling of 128431678686 in words is "one hundred twenty-eight billion, four hundred thirty-one million, six hundred seventy-eight thousand, six hundred eighty-six".