1161719055 has 96 divisors (see below), whose sum is σ = 2447273088. Its totient is φ = 497664000.

The previous prime is 1161719023. The next prime is 1161719063. The reversal of 1161719055 is 5509171611.

It is a Cunningham number, because it is equal to 34084²-1.

It is not a de Polignac number, because 1161719055 - 2⁵ = 1161719023 is a prime.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 2147085 + ... + 2147625.

It is an arithmetic number, because the mean of its divisors is an integer number (25492428).

Almost surely, 2^1161719055 is an apocalyptic number.

1161719055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1161719055 is an abundant number, since it is smaller than the sum of its proper divisors (1285554033).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161719055 is a wasteful number, since it uses less digits than its factorization.

1161719055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977 (or 974 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 36.

The square root of 1161719055 is about 34083.9999853304. Note that the first 4 decimals coincide. The cubic root of 1161719055 is about 1051.2363531723.

It can be divided in two parts, 116 and 1719055, that added together give a palindrome (1719171).

The spelling of 1161719055 in words is "one billion, one hundred sixty-one million, seven hundred nineteen thousand, fifty-five".