1216538004896 has 24 divisors (see below), whose sum is σ = 2453475277764. Its totient is φ = 593433172480.

The previous prime is 1216538004889. The next prime is 1216538004917. The reversal of 1216538004896 is 6984008356121.

It can be written as a sum of positive squares in 2 ways, for example, as 1170801905296 + 45736099600 = 1082036^2 + 213860^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463618355 + ... + 463620978.

Almost surely, 2^{1216538004896} is an apocalyptic number.

1216538004896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1216538004896 is an abundant number, since it is smaller than the sum of its proper divisors (1236937272868).

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

1216538004896 is an equidigital number, since it uses as much as digits as its factorization.

1216538004896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927239384 (or 927239376 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 1216538004896 in words is "one trillion, two hundred sixteen billion, five hundred thirty-eight million, four thousand, eight hundred ninety-six".