128712595662 has 96 divisors (see below), whose sum is σ = 324276825600. Its totient is φ = 36134109504.

The previous prime is 128712595631. The next prime is 128712595663. The reversal of 128712595662 is 266595217821.

128712595662 is a `hidden beast` number, since 1 + 2 + 8 + 71 + 2 + 5 + 9 + 566 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 128712595599 and 128712595608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128712595663) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26217264 + ... + 26222172.

It is an arithmetic number, because the mean of its divisors is an integer number (3377883600).

Almost surely, 2^128712595662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128712595662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162138412800).

128712595662 is an abundant number, since it is smaller than the sum of its proper divisors (195564229938).

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

128712595662 is a wasteful number, since it uses less digits than its factorization.

128712595662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8510 (or 8507 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 128712595662 in words is "one hundred twenty-eight billion, seven hundred twelve million, five hundred ninety-five thousand, six hundred sixty-two".