1051873820881 has 9 divisors (see below), whose sum is σ = 1139025734769. Its totient is φ = 970948142736.

The previous prime is 1051873820843. The next prime is 1051873820891. The reversal of 1051873820881 is 1880283781501.

The square root of 1051873820881 is 1025609.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 245182435281 + 806691385600 = 495159^2 + 898160^2 .

It is not a de Polignac number, because 1051873820881 - 2³³ = 1043283886289 is a prime.

It is a super-2 number, since 2×1051873820881² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1051873820801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13293471 + ... + 13372363.

Almost surely, 2^{1051873820881} is an apocalyptic number.

1051873820881 is the 1025609-th square number.

1051873820881 is the 512805-th centered octagonal number.

It is an amenable number.

1051873820881 is a deficient number, since it is larger than the sum of its proper divisors (87151913888).

1051873820881 is an frugal number, since it uses more digits than its factorization.

1051873820881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157812 (or 78906 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 52.

The spelling of 1051873820881 in words is "one trillion, fifty-one billion, eight hundred seventy-three million, eight hundred twenty thousand, eight hundred eighty-one".