1188081216 has 112 divisors (see below), whose sum is σ = 3991742080. Its totient is φ = 339448320.

The previous prime is 1188081187. The next prime is 1188081221. The reversal of 1188081216 is 6121808811.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37015 + ... + 61206.

Almost surely, 2^1188081216 is an apocalyptic number.

1188081216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1188081216 is an abundant number, since it is smaller than the sum of its proper divisors (2803660864).

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

1188081216 is an equidigital number, since it uses as much as digits as its factorization.

1188081216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98249 (or 98233 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 36.

The square root of 1188081216 is about 34468.5540166686. The cubic root of 1188081216 is about 1059.1286347928.

It can be divided in two parts, 11880 and 81216, that added together give a triangular number (93096 = T₄₃₁).

The spelling of 1188081216 in words is "one billion, one hundred eighty-eight million, eighty-one thousand, two hundred sixteen".