3745273134721 has 2 divisors, whose sum is σ = 3745273134722. Its totient is φ = 3745273134720.

The previous prime is 3745273134703. The next prime is 3745273134737. The reversal of 3745273134721 is 1274313725473.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2966193285696 + 779079849025 = 1722264^2 + 882655^2 .

It is a cyclic number.

It is not a de Polignac number, because 3745273134721 - 2⁵ = 3745273134689 is a prime.

It is not a weakly prime, because it can be changed into another prime (3745273134791) 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 as a sum of consecutive naturals, namely, 1872636567360 + 1872636567361.

It is an arithmetic number, because the mean of its divisors is an integer number (1872636567361).

Almost surely, 2^{3745273134721} is an apocalyptic number.

It is an amenable number.

3745273134721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3745273134721 is an equidigital number, since it uses as much as digits as its factorization.

3745273134721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2963520, while the sum is 49.

The spelling of 3745273134721 in words is "three trillion, seven hundred forty-five billion, two hundred seventy-three million, one hundred thirty-four thousand, seven hundred twenty-one".