2279797243781 has 2 divisors, whose sum is σ = 2279797243782. Its totient is φ = 2279797243780.

The previous prime is 2279797243747. The next prime is 2279797243847. The reversal of 2279797243781 is 1873427979722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2164991474881 + 114805768900 = 1471391^2 + 338830^2 .

It is a cyclic number.

It is not a de Polignac number, because 2279797243781 - 2¹⁰ = 2279797242757 is a prime.

It is a super-2 number, since 2×2279797243781² (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 (2279797243481) 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, 1139898621890 + 1139898621891.

It is an arithmetic number, because the mean of its divisors is an integer number (1139898621891).

Almost surely, 2^{2279797243781} is an apocalyptic number.

It is an amenable number.

2279797243781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2279797243781 is an equidigital number, since it uses as much as digits as its factorization.

2279797243781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 149361408, while the sum is 68.

The spelling of 2279797243781 in words is "two trillion, two hundred seventy-nine billion, seven hundred ninety-seven million, two hundred forty-three thousand, seven hundred eighty-one".