1216166118530 has 16 divisors (see below), whose sum is σ = 2388108014784. Its totient is φ = 442242224880.

The previous prime is 1216166118511. The next prime is 1216166118569. The reversal of 1216166118530 is 358116616121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5528027702 + ... + 5528027921.

It is an arithmetic number, because the mean of its divisors is an integer number (149256750924).

Almost surely, 2^{1216166118530} is an apocalyptic number.

1216166118530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216166118530 is a deficient number, since it is larger than the sum of its proper divisors (1171941896254).

1216166118530 is a wasteful number, since it uses less digits than its factorization.

1216166118530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11056055641.

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 1216166118530 in words is "one trillion, two hundred sixteen billion, one hundred sixty-six million, one hundred eighteen thousand, five hundred thirty".