12704528655 has 432 divisors, whose sum is σ = 31227565824. Its totient is φ = 4714536960.

The previous prime is 12704528651. The next prime is 12704528663. The reversal of 12704528655 is 55682540721.

12704528655 is a `hidden beast` number, since 1 + 2 + 70 + 4 + 528 + 6 + 55 = 666.

It is not a de Polignac number, because 12704528655 - 2² = 12704528651 is a prime.

It is a super-2 number, since 2×12704528655² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12704528655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12704528651) by changing a digit.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 409823490 + ... + 409823520.

It is an arithmetic number, because the mean of its divisors is an integer number (72286032).

Almost surely, 2^12704528655 is an apocalyptic number.

12704528655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12704528655 is an abundant number, since it is smaller than the sum of its proper divisors (18523037169).

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

12704528655 is a wasteful number, since it uses less digits than its factorization.

12704528655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The spelling of 12704528655 in words is "twelve billion, seven hundred four million, five hundred twenty-eight thousand, six hundred fifty-five".