1216626113474 has 4 divisors (see below), whose sum is σ = 1824939170214. Its totient is φ = 608313056736.

The previous prime is 1216626113453. The next prime is 1216626113477. The reversal of 1216626113474 is 4743116266121.

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

It can be written as a sum of positive squares in only one way, i.e., 1052969456449 + 163656657025 = 1026143^2 + 404545^2 .

It is not an unprimeable number, because it can be changed into a prime (1216626113477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304156528367 + ... + 304156528370.

Almost surely, 2^{1216626113474} is an apocalyptic number.

1216626113474 is a deficient number, since it is larger than the sum of its proper divisors (608313056740).

1216626113474 is an equidigital number, since it uses as much as digits as its factorization.

1216626113474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608313056739.

The product of its digits is 290304, while the sum is 44.

The spelling of 1216626113474 in words is "one trillion, two hundred sixteen billion, six hundred twenty-six million, one hundred thirteen thousand, four hundred seventy-four".