2144312692661 has 2 divisors, whose sum is σ = 2144312692662. Its totient is φ = 2144312692660.

The previous prime is 2144312692477. The next prime is 2144312692721. The reversal of 2144312692661 is 1662962134412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2143837714225 + 474978436 = 1464185^2 + 21794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2144312692661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2144312695661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072156346330 + 1072156346331.

It is an arithmetic number, because the mean of its divisors is an integer number (1072156346331).

Almost surely, 2^{2144312692661} is an apocalyptic number.

It is an amenable number.

2144312692661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2144312692661 is an equidigital number, since it uses as much as digits as its factorization.

2144312692661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 47.

It can be divided in two parts, 214431 and 2692661, that added together give a palindrome (2907092).

The spelling of 2144312692661 in words is "two trillion, one hundred forty-four billion, three hundred twelve million, six hundred ninety-two thousand, six hundred sixty-one".