3791571749081 has 2 divisors, whose sum is σ = 3791571749082. Its totient is φ = 3791571749080.

The previous prime is 3791571749051. The next prime is 3791571749129. The reversal of 3791571749081 is 1809471751973.

3791571749081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2487827971225 + 1303743777856 = 1577285^2 + 1141816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3791571749081 is a prime.

It is a super-2 number, since 2×3791571749081² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3791571749011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1895785874540 + 1895785874541.

It is an arithmetic number, because the mean of its divisors is an integer number (1895785874541).

Almost surely, 2^{3791571749081} is an apocalyptic number.

It is an amenable number.

3791571749081 is a deficient number, since it is larger than the sum of its proper divisors (1).

3791571749081 is an equidigital number, since it uses as much as digits as its factorization.

3791571749081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13335840, while the sum is 62.

The spelling of 3791571749081 in words is "three trillion, seven hundred ninety-one billion, five hundred seventy-one million, seven hundred forty-nine thousand, eighty-one".