1236166616321 has 96 divisors (see below), whose sum is σ = 1729195776000. Its totient is φ = 870468415488.

The previous prime is 1236166616309. The next prime is 1236166616339.

1236166616321 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1236166616321 - 2⁶ = 1236166616257 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1236166616341) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 117067040 + ... + 117077598.

It is an arithmetic number, because the mean of its divisors is an integer number (18012456000).

Almost surely, 2^{1236166616321} is an apocalyptic number.

It is an amenable number.

1236166616321 is a deficient number, since it is larger than the sum of its proper divisors (493029159679).

1236166616321 is a wasteful number, since it uses less digits than its factorization.

1236166616321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11191 (or 11184 counting only the distinct ones).

The product of its digits is 279936, while the sum is 44.

The spelling of 1236166616321 in words is "one trillion, two hundred thirty-six billion, one hundred sixty-six million, six hundred sixteen thousand, three hundred twenty-one".