1380637280749 has 2 divisors, whose sum is σ = 1380637280750. Its totient is φ = 1380637280748.

The previous prime is 1380637280731. The next prime is 1380637280761. The reversal of 1380637280749 is 9470827360831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1156231379524 + 224405901225 = 1075282^2 + 473715^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380637280749 - 2⁵ = 1380637280717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1380637280693 and 1380637280702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380637880749) 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, 690318640374 + 690318640375.

It is an arithmetic number, because the mean of its divisors is an integer number (690318640375).

Almost surely, 2^{1380637280749} is an apocalyptic number.

It is an amenable number.

1380637280749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380637280749 is an equidigital number, since it uses as much as digits as its factorization.

1380637280749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12192768, while the sum is 58.

The spelling of 1380637280749 in words is "one trillion, three hundred eighty billion, six hundred thirty-seven million, two hundred eighty thousand, seven hundred forty-nine".