128000785637682 has 24 divisors (see below), whose sum is σ = 277335282261180. Its totient is φ = 42666890590080.

The previous prime is 128000785637639. The next prime is 128000785637689. The reversal of 128000785637682 is 286736587000821.

128000785637682 is a `hidden beast` number, since 1 + 2 + 8 + 0 + 0 + 0 + 7 + 8 + 563 + 7 + 68 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 106177135284441 + 21823650353241 = 10304229^2 + 4671579^2 .

It is a super-2 number, since 2×128000785637682² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128000785637689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23884182 + ... + 28748142.

Almost surely, 2^{128000785637682} is an apocalyptic number.

128000785637682 is an abundant number, since it is smaller than the sum of its proper divisors (149334496623498).

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

128000785637682 is a wasteful number, since it uses less digits than its factorization.

128000785637682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6325978 (or 6325975 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 63.

The spelling of 128000785637682 in words is "one hundred twenty-eight trillion, seven hundred eighty-five million, six hundred thirty-seven thousand, six hundred eighty-two".