1216836520992 has 96 divisors (see below), whose sum is σ = 3631643991360. Its totient is φ = 396179320320.

The previous prime is 1216836520877. The next prime is 1216836520993. The reversal of 1216836520992 is 2990256386121.

1216836520992 is a `hidden beast` number, since 1 + 21 + 6 + 8 + 3 + 6 + 520 + 9 + 92 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1216836520992² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1216836520993) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 16339309 + ... + 16413612.

It is an arithmetic number, because the mean of its divisors is an integer number (37829624910).

Almost surely, 2^{1216836520992} is an apocalyptic number.

1216836520992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1216836520992 is an abundant number, since it is smaller than the sum of its proper divisors (2414807470368).

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

1216836520992 is a wasteful number, since it uses less digits than its factorization.

1216836520992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32752983 (or 32752969 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 1216836520992 in words is "one trillion, two hundred sixteen billion, eight hundred thirty-six million, five hundred twenty thousand, nine hundred ninety-two".