1216363953744 has 60 divisors (see below), whose sum is σ = 3483295500256. Its totient is φ = 396025471296.

The previous prime is 1216363953743. The next prime is 1216363953769. The reversal of 1216363953744 is 4473593636121.

1216363953744 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 3 + 63 + 9 + 537 + 44 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216363953743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98214412 + ... + 98226795.

Almost surely, 2^{1216363953744} is an apocalyptic number.

It is an amenable number.

1216363953744 is an abundant number, since it is smaller than the sum of its proper divisors (2266931546512).

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

1216363953744 is a wasteful number, since it uses less digits than its factorization.

1216363953744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196441264 (or 196441255 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 54.

The spelling of 1216363953744 in words is "one trillion, two hundred sixteen billion, three hundred sixty-three million, nine hundred fifty-three thousand, seven hundred forty-four".