1161706557 has 16 divisors (see below), whose sum is σ = 1704714048. Its totient is φ = 697831680.

The previous prime is 1161706529. The next prime is 1161706603. The reversal of 1161706557 is 7556071611.

It is not a de Polignac number, because 1161706557 - 2²² = 1157512253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161706657) 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 in 15 ways as a sum of consecutive naturals, for example, 152038 + ... + 159495.

It is an arithmetic number, because the mean of its divisors is an integer number (106544628).

Almost surely, 2^1161706557 is an apocalyptic number.

It is an amenable number.

1161706557 is a deficient number, since it is larger than the sum of its proper divisors (543007491).

1161706557 is a wasteful number, since it uses less digits than its factorization.

1161706557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311660.

The product of its (nonzero) digits is 44100, while the sum is 39.

The square root of 1161706557 is about 34083.8166436800. The cubic root of 1161706557 is about 1051.2325833569.

The spelling of 1161706557 in words is "one billion, one hundred sixty-one million, seven hundred six thousand, five hundred fifty-seven".