881456221881 has 81 divisors (see below), whose sum is σ = 1389402287143. Its totient is φ = 538379304960.

The previous prime is 881456221859. The next prime is 881456221883. The reversal of 881456221881 is 188122654188.

The square root of 881456221881 is 938859.

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

881456221881 is a `hidden beast` number, since 8 + 8 + 1 + 4 + 5 + 622 + 1 + 8 + 8 + 1 = 666.

It can be written as a sum of positive squares in 13 ways, for example, as 576513711225 + 304942510656 = 759285^2 + 552216^2 .

It is not a de Polignac number, because 881456221881 - 2¹⁹ = 881455697593 is a prime.

It is a super-2 number, since 2×881456221881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (881456221883) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1963153945 + ... + 1963154393.

Almost surely, 2^881456221881 is an apocalyptic number.

881456221881 is the 938859-th square number.

881456221881 is the 469430-th centered octagonal number.

It is an amenable number.

881456221881 is a deficient number, since it is larger than the sum of its proper divisors (507946065262).

881456221881 is an equidigital number, since it uses as much as digits as its factorization.

881456221881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 510 counting only the distinct ones).

The product of its digits is 1966080, while the sum is 54.

The spelling of 881456221881 in words is "eight hundred eighty-one billion, four hundred fifty-six million, two hundred twenty-one thousand, eight hundred eighty-one".