1161671855 has 8 divisors (see below), whose sum is σ = 1394377200. Its totient is φ = 929090176.

The previous prime is 1161671851. The next prime is 1161671891. The reversal of 1161671855 is 5581761611.

It is a happy number.

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 1161671855 - 2² = 1161671851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161671851) 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, 8810 + ... + 48999.

It is an arithmetic number, because the mean of its divisors is an integer number (174297150).

Almost surely, 2^1161671855 is an apocalyptic number.

1161671855 is a deficient number, since it is larger than the sum of its proper divisors (232705345).

1161671855 is an equidigital number, since it uses as much as digits as its factorization.

1161671855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61833.

The product of its digits is 50400, while the sum is 41.

The square root of 1161671855 is about 34083.3075713024. The cubic root of 1161671855 is about 1051.2221159297. Note that the first 3 decimals are identical.

The spelling of 1161671855 in words is "one billion, one hundred sixty-one million, six hundred seventy-one thousand, eight hundred fifty-five".