1181550955 has 8 divisors (see below), whose sum is σ = 1526927472. Its totient is φ = 872529888.

The previous prime is 1181550943. The next prime is 1181550959. The reversal of 1181550955 is 5590551811.

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 1181550955 - 2⁷ = 1181550827 is a prime.

It is a super-2 number, since 2×1181550955² = 2792125318522824050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1181550959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9088789 + ... + 9088918.

It is an arithmetic number, because the mean of its divisors is an integer number (190865934).

Almost surely, 2^1181550955 is an apocalyptic number.

1181550955 is a deficient number, since it is larger than the sum of its proper divisors (345376517).

1181550955 is a wasteful number, since it uses less digits than its factorization.

1181550955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18177725.

The product of its (nonzero) digits is 45000, while the sum is 40.

The square root of 1181550955 is about 34373.6956843456. The cubic root of 1181550955 is about 1057.1845765693.

The spelling of 1181550955 in words is "one billion, one hundred eighty-one million, five hundred fifty thousand, nine hundred fifty-five".