1216620077888 has 14 divisors (see below), whose sum is σ = 2414230467186. Its totient is φ = 608310038912.

The previous prime is 1216620077873. The next prime is 1216620077923. The reversal of 1216620077888 is 8887700266121.

It can be written as a sum of positive squares in only one way, i.e., 1041199833664 + 175420244224 = 1020392^2 + 418832^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9504844295 + ... + 9504844422.

Almost surely, 2^{1216620077888} is an apocalyptic number.

It is an amenable number.

1216620077888 is a deficient number, since it is larger than the sum of its proper divisors (1197610389298).

1216620077888 is an equidigital number, since it uses as much as digits as its factorization.

1216620077888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19009688729 (or 19009688719 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 56.

The spelling of 1216620077888 in words is "one trillion, two hundred sixteen billion, six hundred twenty million, seventy-seven thousand, eight hundred eighty-eight".