1216054401652 has 48 divisors (see below), whose sum is σ = 2163619325952. Its totient is φ = 597963525120.

The previous prime is 1216054401647. The next prime is 1216054401659. The reversal of 1216054401652 is 2561044506121.

It is a super-3 number, since 3×1216054401652³ (a number of 37 digits) contains 333 as substring.

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 15 ways as a sum of consecutive naturals, for example, 72839818 + ... + 72856510.

It is an arithmetic number, because the mean of its divisors is an integer number (45075402624).

Almost surely, 2^{1216054401652} is an apocalyptic number.

It is an amenable number.

1216054401652 is a deficient number, since it is larger than the sum of its proper divisors (947564924300).

1216054401652 is a wasteful number, since it uses less digits than its factorization.

1216054401652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17968 (or 17966 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

Adding to 1216054401652 its reverse (2561044506121), we get a palindrome (3777098907773).

The spelling of 1216054401652 in words is "one trillion, two hundred sixteen billion, fifty-four million, four hundred one thousand, six hundred fifty-two".