1216247055264 has 60 divisors (see below), whose sum is σ = 3576948812514. Its totient is φ = 405415684224.

The previous prime is 1216247055229. The next prime is 1216247055313. The reversal of 1216247055264 is 4625507426121.

1216247055264 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 24 + 70 + 552 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1189451984400 + 26795070864 = 1090620^2 + 163692^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 234612967 + ... + 234618150.

Almost surely, 2^{1216247055264} is an apocalyptic number.

It is an amenable number.

1216247055264 is an abundant number, since it is smaller than the sum of its proper divisors (2360701757250).

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

1216247055264 is an equidigital number, since it uses as much as digits as its factorization.

1216247055264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469231139 (or 469231122 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 1216247055264 in words is "one trillion, two hundred sixteen billion, two hundred forty-seven million, fifty-five thousand, two hundred sixty-four".