1216364954904 has 192 divisors, whose sum is σ = 3663489772800. Its totient is φ = 361455494400.

The previous prime is 1216364954897. The next prime is 1216364954923. The reversal of 1216364954904 is 4094594636121.

1216364954904 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 3 + 64 + 95 + 490 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 97000267 + ... + 97012805.

It is an arithmetic number, because the mean of its divisors is an integer number (19080675900).

Almost surely, 2^{1216364954904} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216364954904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1831744886400).

1216364954904 is an abundant number, since it is smaller than the sum of its proper divisors (2447124817896).

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

1216364954904 is a wasteful number, since it uses less digits than its factorization.

1216364954904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14926 (or 14919 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 1216364954904 in words is "one trillion, two hundred sixteen billion, three hundred sixty-four million, nine hundred fifty-four thousand, nine hundred four".