1181327616 has 216 divisors, whose sum is σ = 3941159040. Its totient is φ = 333324288.

The previous prime is 1181327611. The next prime is 1181327617. The reversal of 1181327616 is 6167231811.

1181327616 is a `hidden beast` number, since 1 + 1 + 8 + 1 + 32 + 7 + 616 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181327611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1434981 + ... + 1435803.

Almost surely, 2^1181327616 is an apocalyptic number.

1181327616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1181327616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1970579520).

1181327616 is an abundant number, since it is smaller than the sum of its proper divisors (2759831424).

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

1181327616 is an equidigital number, since it uses as much as digits as its factorization.

1181327616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941 (or 924 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1181327616 is about 34370.4468402725. The cubic root of 1181327616 is about 1057.1179620281.

The spelling of 1181327616 in words is "one billion, one hundred eighty-one million, three hundred twenty-seven thousand, six hundred sixteen".