1081448511881 has 2 divisors, whose sum is σ = 1081448511882. Its totient is φ = 1081448511880.

The previous prime is 1081448511863. The next prime is 1081448511911. The reversal of 1081448511881 is 1881158441801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1001350455625 + 80098056256 = 1000675^2 + 283016^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081448511881 - 2¹⁴ = 1081448495497 is a prime.

It is a super-2 number, since 2×1081448511881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1081448511841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540724255940 + 540724255941.

It is an arithmetic number, because the mean of its divisors is an integer number (540724255941).

Almost surely, 2^{1081448511881} is an apocalyptic number.

It is an amenable number.

1081448511881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081448511881 is an equidigital number, since it uses as much as digits as its factorization.

1081448511881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 327680, while the sum is 50.

The spelling of 1081448511881 in words is "one trillion, eighty-one billion, four hundred forty-eight million, five hundred eleven thousand, eight hundred eighty-one".