1161322553 has 2 divisors, whose sum is σ = 1161322554. Its totient is φ = 1161322552.

The previous prime is 1161322511. The next prime is 1161322571. The reversal of 1161322553 is 3552231611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1076627344 + 84695209 = 32812^2 + 9203^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161322553 - 2⁶ = 1161322489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161322573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580661276 + 580661277.

It is an arithmetic number, because the mean of its divisors is an integer number (580661277).

Almost surely, 2^1161322553 is an apocalyptic number.

It is an amenable number.

1161322553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161322553 is an equidigital number, since it uses as much as digits as its factorization.

1161322553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 29.

The square root of 1161322553 is about 34078.1829474519. The cubic root of 1161322553 is about 1051.1167417096.

The spelling of 1161322553 in words is "one billion, one hundred sixty-one million, three hundred twenty-two thousand, five hundred fifty-three".