1216504850 has 96 divisors (see below), whose sum is σ = 2566710720. Its totient is φ = 425088000.

The previous prime is 1216504843. The next prime is 1216504859. The reversal of 1216504850 is 584056121.

It is not an unprimeable number, because it can be changed into a prime (1216504859) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1645781 + ... + 1646519.

It is an arithmetic number, because the mean of its divisors is an integer number (26736570).

Almost surely, 2^1216504850 is an apocalyptic number.

1216504850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216504850 is an abundant number, since it is smaller than the sum of its proper divisors (1350205870).

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

1216504850 is a wasteful number, since it uses less digits than its factorization.

1216504850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 1216504850 is about 34878.4295804728. The cubic root of 1216504850 is about 1067.5083520527.

The spelling of 1216504850 in words is "one billion, two hundred sixteen million, five hundred four thousand, eight hundred fifty".