2729261907181 has 2 divisors, whose sum is σ = 2729261907182. Its totient is φ = 2729261907180.

The previous prime is 2729261907107. The next prime is 2729261907191. The reversal of 2729261907181 is 1817091629272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1777798222281 + 951463684900 = 1333341^2 + 975430^2 .

It is a cyclic number.

It is not a de Polignac number, because 2729261907181 - 2¹⁵ = 2729261874413 is a prime.

It is a super-2 number, since 2×2729261907181² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2729261907191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364630953590 + 1364630953591.

It is an arithmetic number, because the mean of its divisors is an integer number (1364630953591).

Almost surely, 2^{2729261907181} is an apocalyptic number.

It is an amenable number.

2729261907181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2729261907181 is an equidigital number, since it uses as much as digits as its factorization.

2729261907181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 2729261907181 in words is "two trillion, seven hundred twenty-nine billion, two hundred sixty-one million, nine hundred seven thousand, one hundred eighty-one".