2181409937263 has 2 divisors, whose sum is σ = 2181409937264. Its totient is φ = 2181409937262.

The previous prime is 2181409937257. The next prime is 2181409937293. The reversal of 2181409937263 is 3627399041812.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2181409937263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2181409937293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090704968631 + 1090704968632.

It is an arithmetic number, because the mean of its divisors is an integer number (1090704968632).

Almost surely, 2^{2181409937263} is an apocalyptic number.

2181409937263 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181409937263 is an equidigital number, since it uses as much as digits as its factorization.

2181409937263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 2181409937263 in words is "two trillion, one hundred eighty-one billion, four hundred nine million, nine hundred thirty-seven thousand, two hundred sixty-three".