1216141919579 has 4 divisors (see below), whose sum is σ = 1216145156520. Its totient is φ = 1216138682640.

The previous prime is 1216141919557. The next prime is 1216141919621. The reversal of 1216141919579 is 9759191416121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1216141919579 - 2⁴⁰ = 116630291803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216141919549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 967682 + ... + 1835399.

It is an arithmetic number, because the mean of its divisors is an integer number (304036289130).

Almost surely, 2^{1216141919579} is an apocalyptic number.

1216141919579 is a deficient number, since it is larger than the sum of its proper divisors (3236941).

1216141919579 is an equidigital number, since it uses as much as digits as its factorization.

1216141919579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236940.

The product of its digits is 1224720, while the sum is 56.

The spelling of 1216141919579 in words is "one trillion, two hundred sixteen billion, one hundred forty-one million, nine hundred nineteen thousand, five hundred seventy-nine".