881612804381 has 2 divisors, whose sum is σ = 881612804382. Its totient is φ = 881612804380.

The previous prime is 881612804377. The next prime is 881612804473. The reversal of 881612804381 is 183408216188.

881612804381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 587930098756 + 293682705625 = 766766^2 + 541925^2 .

It is a cyclic number.

It is not a de Polignac number, because 881612804381 - 2² = 881612804377 is a prime.

It is a super-2 number, since 2×881612804381² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (881612804311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440806402190 + 440806402191.

It is an arithmetic number, because the mean of its divisors is an integer number (440806402191).

Almost surely, 2^881612804381 is an apocalyptic number.

It is an amenable number.

881612804381 is a deficient number, since it is larger than the sum of its proper divisors (1).

881612804381 is an equidigital number, since it uses as much as digits as its factorization.

881612804381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 589824, while the sum is 50.

The spelling of 881612804381 in words is "eight hundred eighty-one billion, six hundred twelve million, eight hundred four thousand, three hundred eighty-one".