1161517055 has 8 divisors (see below), whose sum is σ = 1397230800. Its totient is φ = 926940096.

The previous prime is 1161517033. The next prime is 1161517079. The reversal of 1161517055 is 5507151611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1161517055 - 2¹⁸ = 1161254911 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281945 + ... + 286034.

It is an arithmetic number, because the mean of its divisors is an integer number (174653850).

Almost surely, 2^1161517055 is an apocalyptic number.

1161517055 is a deficient number, since it is larger than the sum of its proper divisors (235713745).

1161517055 is an equidigital number, since it uses as much as digits as its factorization.

1161517055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568393.

The product of its (nonzero) digits is 5250, while the sum is 32.

The square root of 1161517055 is about 34081.0365892823. The cubic root of 1161517055 is about 1051.1754198937.

Adding to 1161517055 its reverse (5507151611), we get a palindrome (6668668666).

The spelling of 1161517055 in words is "one billion, one hundred sixty-one million, five hundred seventeen thousand, fifty-five".