2244764625781 has 2 divisors, whose sum is σ = 2244764625782. Its totient is φ = 2244764625780.

The previous prime is 2244764625773. The next prime is 2244764625833. The reversal of 2244764625781 is 1875264674422.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2215307768881 + 29456856900 = 1488391^2 + 171630^2 .

It is a cyclic number.

It is not a de Polignac number, because 2244764625781 - 2³ = 2244764625773 is a prime.

It is a super-2 number, since 2×2244764625781² (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 (2244764625731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1122382312890 + 1122382312891.

It is an arithmetic number, because the mean of its divisors is an integer number (1122382312891).

Almost surely, 2^{2244764625781} is an apocalyptic number.

It is an amenable number.

2244764625781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2244764625781 is an equidigital number, since it uses as much as digits as its factorization.

2244764625781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36126720, while the sum is 58.

The spelling of 2244764625781 in words is "two trillion, two hundred forty-four billion, seven hundred sixty-four million, six hundred twenty-five thousand, seven hundred eighty-one".