1728131680026 has 16 divisors (see below), whose sum is σ = 3840292622400. Its totient is φ = 576043893324.

The previous prime is 1728131679961. The next prime is 1728131680027. The reversal of 1728131680026 is 6200861318271.

It is not an unprimeable number, because it can be changed into a prime (1728131680027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16001219206 + ... + 16001219313.

It is an arithmetic number, because the mean of its divisors is an integer number (240018288900).

Almost surely, 2^{1728131680026} is an apocalyptic number.

1728131680026 is an abundant number, since it is smaller than the sum of its proper divisors (2112160942374).

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

1728131680026 is a wasteful number, since it uses less digits than its factorization.

1728131680026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32002438530 (or 32002438524 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

Adding to 1728131680026 its reverse (6200861318271), we get a palindrome (7928992998297).

The spelling of 1728131680026 in words is "one trillion, seven hundred twenty-eight billion, one hundred thirty-one million, six hundred eighty thousand, twenty-six".