1279760759561 has 2 divisors, whose sum is σ = 1279760759562. Its totient is φ = 1279760759560.

The previous prime is 1279760759551. The next prime is 1279760759573. The reversal of 1279760759561 is 1659570679721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1173105610000 + 106655149561 = 1083100^2 + 326581^2 .

It is a cyclic number.

It is not a de Polignac number, because 1279760759561 - 2¹⁰ = 1279760758537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1279760759551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639880379780 + 639880379781.

It is an arithmetic number, because the mean of its divisors is an integer number (639880379781).

Almost surely, 2^{1279760759561} is an apocalyptic number.

It is an amenable number.

1279760759561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279760759561 is an equidigital number, since it uses as much as digits as its factorization.

1279760759561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50009400, while the sum is 65.

The spelling of 1279760759561 in words is "one trillion, two hundred seventy-nine billion, seven hundred sixty million, seven hundred fifty-nine thousand, five hundred sixty-one".