2751756325721 has 8 divisors (see below), whose sum is σ = 2980964979720. Its totient is φ = 2540082760176.

The previous prime is 2751756325699. The next prime is 2751756325723. The reversal of 2751756325721 is 1275236571572.

It can be written as a sum of positive squares in 4 ways, for example, as 1274471655625 + 1477284670096 = 1128925^2 + 1215436^2 .

It is not a de Polignac number, because 2751756325721 - 2¹⁸ = 2751756063577 is a prime.

It is a super-2 number, since 2×2751756325721² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2751756325723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 626250950 + ... + 626255343.

It is an arithmetic number, because the mean of its divisors is an integer number (372620622465).

Almost surely, 2^{2751756325721} is an apocalyptic number.

It is an amenable number.

2751756325721 is a deficient number, since it is larger than the sum of its proper divisors (229208653999).

2751756325721 is an equidigital number, since it uses as much as digits as its factorization.

2751756325721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252506332 (or 1252506306 counting only the distinct ones).

The product of its digits is 6174000, while the sum is 53.

The spelling of 2751756325721 in words is "two trillion, seven hundred fifty-one billion, seven hundred fifty-six million, three hundred twenty-five thousand, seven hundred twenty-one".