1171216554 has 32 divisors (see below), whose sum is σ = 2393952000. Its totient is φ = 381910464.

The previous prime is 1171216523. The next prime is 1171216559. The reversal of 1171216554 is 4556121711.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1171216559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40332 + ... + 63000.

It is an arithmetic number, because the mean of its divisors is an integer number (74811000).

Almost surely, 2^1171216554 is an apocalyptic number.

1171216554 is an abundant number, since it is smaller than the sum of its proper divisors (1222735446).

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

1171216554 is a wasteful number, since it uses less digits than its factorization.

1171216554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22862.

The product of its digits is 8400, while the sum is 33.

The square root of 1171216554 is about 34223.0412733877. The cubic root of 1171216554 is about 1054.0933351257.

The spelling of 1171216554 in words is "one billion, one hundred seventy-one million, two hundred sixteen thousand, five hundred fifty-four".