1216550344650 has 24 divisors (see below), whose sum is σ = 3017044855104. Its totient is φ = 324413425200.

The previous prime is 1216550344637. The next prime is 1216550344663. The reversal of 1216550344650 is 564430556121.

It is an interprime number because it is at equal distance from previous prime (1216550344637) and next prime (1216550344663).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4055167666 + ... + 4055167965.

It is an arithmetic number, because the mean of its divisors is an integer number (125710202296).

Almost surely, 2^{1216550344650} is an apocalyptic number.

1216550344650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216550344650 is an abundant number, since it is smaller than the sum of its proper divisors (1800494510454).

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

1216550344650 is a wasteful number, since it uses less digits than its factorization.

1216550344650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8110335646 (or 8110335641 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 1216550344650 in words is "one trillion, two hundred sixteen billion, five hundred fifty million, three hundred forty-four thousand, six hundred fifty".