1380166137569 has 2 divisors, whose sum is σ = 1380166137570. Its totient is φ = 1380166137568.

The previous prime is 1380166137557. The next prime is 1380166137593. The reversal of 1380166137569 is 9657316610831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1377677325025 + 2488812544 = 1173745^2 + 49888^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380166137569 - 2⁸ = 1380166137313 is a prime.

It is a super-2 number, since 2×1380166137569² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1380166137529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690083068784 + 690083068785.

It is an arithmetic number, because the mean of its divisors is an integer number (690083068785).

Almost surely, 2^{1380166137569} is an apocalyptic number.

It is an amenable number.

1380166137569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380166137569 is an equidigital number, since it uses as much as digits as its factorization.

1380166137569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 1380166137569 in words is "one trillion, three hundred eighty billion, one hundred sixty-six million, one hundred thirty-seven thousand, five hundred sixty-nine".