1081555633 has 2 divisors, whose sum is σ = 1081555634. Its totient is φ = 1081555632.

The previous prime is 1081555619. The next prime is 1081555729. The reversal of 1081555633 is 3365551801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 990486784 + 91068849 = 31472^2 + 9543^2 .

It is an emirp because it is prime and its reverse (3365551801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1081555633 - 2²¹ = 1079458481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1081555592 and 1081555601.

It is not a weakly prime, because it can be changed into another prime (1081555133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540777816 + 540777817.

It is an arithmetic number, because the mean of its divisors is an integer number (540777817).

Almost surely, 2^1081555633 is an apocalyptic number.

It is an amenable number.

1081555633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081555633 is an equidigital number, since it uses as much as digits as its factorization.

1081555633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 1081555633 is about 32887.0131358869. The cubic root of 1081555633 is about 1026.4779418638.

The spelling of 1081555633 in words is "one billion, eighty-one million, five hundred fifty-five thousand, six hundred thirty-three".