1161605533 has 4 divisors (see below), whose sum is σ = 1267206048. Its totient is φ = 1056005020.

The previous prime is 1161605531. The next prime is 1161605573. The reversal of 1161605533 is 3355061611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1161605533 - 2¹ = 1161605531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1161605495 and 1161605504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161605531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52800241 + ... + 52800262.

It is an arithmetic number, because the mean of its divisors is an integer number (316801512).

Almost surely, 2^1161605533 is an apocalyptic number.

It is an amenable number.

1161605533 is a deficient number, since it is larger than the sum of its proper divisors (105600515).

1161605533 is a wasteful number, since it uses less digits than its factorization.

1161605533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105600514.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 1161605533 is about 34082.3346178046. The cubic root of 1161605533 is about 1051.2021101425.

The spelling of 1161605533 in words is "one billion, one hundred sixty-one million, six hundred five thousand, five hundred thirty-three".