1026881641 has 2 divisors, whose sum is σ = 1026881642. Its totient is φ = 1026881640.

The previous prime is 1026881633. The next prime is 1026881663. The reversal of 1026881641 is 1461886201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 993195225 + 33686416 = 31515^2 + 5804^2 .

It is a cyclic number.

It is not a de Polignac number, because 1026881641 - 2³ = 1026881633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1026881641.

It is not a weakly prime, because it can be changed into another prime (1026881671) 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 as a sum of consecutive naturals, namely, 513440820 + 513440821.

It is an arithmetic number, because the mean of its divisors is an integer number (513440821).

Almost surely, 2^1026881641 is an apocalyptic number.

It is an amenable number.

1026881641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1026881641 is an equidigital number, since it uses as much as digits as its factorization.

1026881641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 1026881641 is about 32044.9940084251. The cubic root of 1026881641 is about 1008.8814336149.

It can be divided in two parts, 102688 and 1641, that added together give a square (104329 = 323²).

The spelling of 1026881641 in words is "one billion, twenty-six million, eight hundred eighty-one thousand, six hundred forty-one".