1216741626161 has 16 divisors (see below), whose sum is σ = 1290533368320. Its totient is φ = 1143198040320.

The previous prime is 1216741626143. The next prime is 1216741626239. The reversal of 1216741626161 is 1616261476121.

It is a cyclic number.

It is not a de Polignac number, because 1216741626161 - 2⁶ = 1216741626097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216741646161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25043030 + ... + 25091568.

It is an arithmetic number, because the mean of its divisors is an integer number (80658335520).

Almost surely, 2^{1216741626161} is an apocalyptic number.

It is an amenable number.

1216741626161 is a deficient number, since it is larger than the sum of its proper divisors (73791742159).

1216741626161 is a wasteful number, since it uses less digits than its factorization.

1216741626161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51064.

The product of its digits is 145152, while the sum is 44.

The spelling of 1216741626161 in words is "one trillion, two hundred sixteen billion, seven hundred forty-one million, six hundred twenty-six thousand, one hundred sixty-one".