1216353044610 has 96 divisors (see below), whose sum is σ = 3454484874048. Its totient is φ = 294491813760.

The previous prime is 1216353044593. The next prime is 1216353044623. The reversal of 1216353044610 is 164403536121.

1216353044610 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 3 + 5 + 30 + 4 + 4 + 610 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29452 + ... + 1559991.

It is an arithmetic number, because the mean of its divisors is an integer number (35984217438).

Almost surely, 2^{1216353044610} is an apocalyptic number.

1216353044610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216353044610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1727242437024).

1216353044610 is an abundant number, since it is smaller than the sum of its proper divisors (2238131829438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1216353044610 is a wasteful number, since it uses less digits than its factorization.

1216353044610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590240 (or 1590237 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 1216353044610 in words is "one trillion, two hundred sixteen billion, three hundred fifty-three million, forty-four thousand, six hundred ten".