1216054401654 has 16 divisors (see below), whose sum is σ = 2575174027248. Its totient is φ = 381507263232.

The previous prime is 1216054401647. The next prime is 1216054401659. The reversal of 1216054401654 is 4561044506121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216054401659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5961050887 + ... + 5961051090.

It is an arithmetic number, because the mean of its divisors is an integer number (160948376703).

Almost surely, 2^{1216054401654} is an apocalyptic number.

1216054401654 is an abundant number, since it is smaller than the sum of its proper divisors (1359119625594).

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

1216054401654 is a wasteful number, since it uses less digits than its factorization.

1216054401654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11922101999.

The product of its (nonzero) digits is 115200, while the sum is 39.

Adding to 1216054401654 its reverse (4561044506121), we get a palindrome (5777098907775).

The spelling of 1216054401654 in words is "one trillion, two hundred sixteen billion, fifty-four million, four hundred one thousand, six hundred fifty-four".