1161495553 has 2 divisors, whose sum is σ = 1161495554. Its totient is φ = 1161495552.

The previous prime is 1161495541. The next prime is 1161495563. The reversal of 1161495553 is 3555941611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1124126784 + 37368769 = 33528^2 + 6113^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161495553 - 2¹³ = 1161487361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161495523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580747776 + 580747777.

It is an arithmetic number, because the mean of its divisors is an integer number (580747777).

Almost surely, 2^1161495553 is an apocalyptic number.

It is an amenable number.

1161495553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161495553 is an equidigital number, since it uses as much as digits as its factorization.

1161495553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 40.

The square root of 1161495553 is about 34080.7211338023. The cubic root of 1161495553 is about 1051.1689334017.

The spelling of 1161495553 in words is "one billion, one hundred sixty-one million, four hundred ninety-five thousand, five hundred fifty-three".