2544785369389 has 2 divisors, whose sum is σ = 2544785369390. Its totient is φ = 2544785369388.

The previous prime is 2544785369341. The next prime is 2544785369419. The reversal of 2544785369389 is 9839635874452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2156662599364 + 388122770025 = 1468558^2 + 622995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2544785369389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2544785369309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272392684694 + 1272392684695.

It is an arithmetic number, because the mean of its divisors is an integer number (1272392684695).

Almost surely, 2^{2544785369389} is an apocalyptic number.

It is an amenable number.

2544785369389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2544785369389 is an equidigital number, since it uses as much as digits as its factorization.

2544785369389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1567641600, while the sum is 73.

The spelling of 2544785369389 in words is "two trillion, five hundred forty-four billion, seven hundred eighty-five million, three hundred sixty-nine thousand, three hundred eighty-nine".