881409037261 has 2 divisors, whose sum is σ = 881409037262. Its totient is φ = 881409037260.

The previous prime is 881409037217. The next prime is 881409037319. The reversal of 881409037261 is 162730904188.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 695587692361 + 185821344900 = 834019^2 + 431070^2 .

It is a cyclic number.

It is not a de Polignac number, because 881409037261 - 2⁷ = 881409037133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (881409037211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440704518630 + 440704518631.

It is an arithmetic number, because the mean of its divisors is an integer number (440704518631).

Almost surely, 2^881409037261 is an apocalyptic number.

It is an amenable number.

881409037261 is a deficient number, since it is larger than the sum of its proper divisors (1).

881409037261 is an equidigital number, since it uses as much as digits as its factorization.

881409037261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 881409037261 in words is "eight hundred eighty-one billion, four hundred nine million, thirty-seven thousand, two hundred sixty-one".