2381656181249 has 2 divisors, whose sum is σ = 2381656181250. Its totient is φ = 2381656181248.

The previous prime is 2381656181239. The next prime is 2381656181309. The reversal of 2381656181249 is 9421816561832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1297833600625 + 1083822580624 = 1139225^2 + 1041068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2381656181249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2381656181194 and 2381656181203.

It is not a weakly prime, because it can be changed into another prime (2381656181239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1190828090624 + 1190828090625.

It is an arithmetic number, because the mean of its divisors is an integer number (1190828090625).

Almost surely, 2^{2381656181249} is an apocalyptic number.

It is an amenable number.

2381656181249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2381656181249 is an equidigital number, since it uses as much as digits as its factorization.

2381656181249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4976640, while the sum is 56.

The spelling of 2381656181249 in words is "two trillion, three hundred eighty-one billion, six hundred fifty-six million, one hundred eighty-one thousand, two hundred forty-nine".