128698607412 has 18 divisors (see below), whose sum is σ = 325321479938. Its totient is φ = 42899535792.

The previous prime is 128698607393. The next prime is 128698607419. The reversal of 128698607412 is 214706896821.

It is a happy number.

128698607412 is a `hidden beast` number, since 1 + 2 + 86 + 98 + 60 + 7 + 412 = 666.

It can be written as a sum of positive squares in only one way, i.e., 87536689956 + 41161917456 = 295866^2 + 202884^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128698607419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1787480623 + ... + 1787480694.

Almost surely, 2^128698607412 is an apocalyptic number.

128698607412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128698607412 is an abundant number, since it is smaller than the sum of its proper divisors (196622872526).

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

128698607412 is a wasteful number, since it uses less digits than its factorization.

128698607412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574961327 (or 3574961322 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 128698607412 in words is "one hundred twenty-eight billion, six hundred ninety-eight million, six hundred seven thousand, four hundred twelve".