128140866756 has 96 divisors (see below), whose sum is σ = 381798144000. Its totient is φ = 36407103264.

The previous prime is 128140866727. The next prime is 128140866761. The reversal of 128140866756 is 657668041821.

128140866756 is a `hidden beast` number, since 128 + 1 + 408 + 6 + 67 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 338136 + ... + 608783.

It is an arithmetic number, because the mean of its divisors is an integer number (3977064000).

Almost surely, 2^128140866756 is an apocalyptic number.

It is an amenable number.

128140866756 is an abundant number, since it is smaller than the sum of its proper divisors (253657277244).

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

128140866756 is a wasteful number, since it uses less digits than its factorization.

128140866756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947118 (or 947110 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 128140866756 in words is "one hundred twenty-eight billion, one hundred forty million, eight hundred sixty-six thousand, seven hundred fifty-six".