671728699125 has 48 divisors (see below), whose sum is σ = 1320985044288. Its totient is φ = 325686636000.

The previous prime is 671728699123. The next prime is 671728699127. The reversal of 671728699125 is 521996827176.

671728699125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (671728699123) and next prime (671728699127).

It is not a de Polignac number, because 671728699125 - 2¹ = 671728699123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671728699123) 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, 27128179 + ... + 27152928.

It is an arithmetic number, because the mean of its divisors is an integer number (27520521756).

Almost surely, 2^671728699125 is an apocalyptic number.

It is an amenable number.

671728699125 is a deficient number, since it is larger than the sum of its proper divisors (649256345163).

671728699125 is a wasteful number, since it uses less digits than its factorization.

671728699125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54281139 (or 54281126 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The spelling of 671728699125 in words is "six hundred seventy-one billion, seven hundred twenty-eight million, six hundred ninety-nine thousand, one hundred twenty-five".