1260508691881 has 2 divisors, whose sum is σ = 1260508691882. Its totient is φ = 1260508691880.

The previous prime is 1260508691879. The next prime is 1260508691903. The reversal of 1260508691881 is 1881968050621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1245770731881 + 14737960000 = 1116141^2 + 121400^2 .

It is a cyclic number.

It is not a de Polignac number, because 1260508691881 - 2¹ = 1260508691879 is a prime.

It is a super-2 number, since 2×1260508691881² (a number of 25 digits) contains 22 as substring.

Together with 1260508691879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1260508691081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630254345940 + 630254345941.

It is an arithmetic number, because the mean of its divisors is an integer number (630254345941).

Almost surely, 2^{1260508691881} is an apocalyptic number.

It is an amenable number.

1260508691881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260508691881 is an equidigital number, since it uses as much as digits as its factorization.

1260508691881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1658880, while the sum is 55.

The spelling of 1260508691881 in words is "one trillion, two hundred sixty billion, five hundred eight million, six hundred ninety-one thousand, eight hundred eighty-one".