128680045387256 has 32 divisors (see below), whose sum is σ = 263259831052080. Its totient is φ = 58479674764800.

The previous prime is 128680045387207. The next prime is 128680045387297. The reversal of 128680045387256 is 652783540086821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 128680045387192 and 128680045387201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140227025 + ... + 141141696.

Almost surely, 2^{128680045387256} is an apocalyptic number.

It is an amenable number.

128680045387256 is an abundant number, since it is smaller than the sum of its proper divisors (134579785664824).

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

128680045387256 is a wasteful number, since it uses less digits than its factorization.

128680045387256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281373935 (or 281373931 counting only the distinct ones).

The product of its (nonzero) digits is 154828800, while the sum is 65.

The spelling of 128680045387256 in words is "one hundred twenty-eight trillion, six hundred eighty billion, forty-five million, three hundred eighty-seven thousand, two hundred fifty-six".