1212653428884 has 72 divisors (see below), whose sum is σ = 3081750525672. Its totient is φ = 402051686400.

The previous prime is 1212653428879. The next prime is 1212653428907. The reversal of 1212653428884 is 4888243562121.

1212653428884 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 6 + 534 + 28 + 8 + 84 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1601600400 + 1211051828484 = 40020^2 + 1100478^2 .

It is a super-3 number, since 3×1212653428884³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212653428884.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50937784 + ... + 50961584.

Almost surely, 2^{1212653428884} is an apocalyptic number.

It is an amenable number.

1212653428884 is an abundant number, since it is smaller than the sum of its proper divisors (1869097096788).

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

1212653428884 is a wasteful number, since it uses less digits than its factorization.

1212653428884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31337 (or 31332 counting only the distinct ones).

The product of its digits is 5898240, while the sum is 54.

The spelling of 1212653428884 in words is "one trillion, two hundred twelve billion, six hundred fifty-three million, four hundred twenty-eight thousand, eight hundred eighty-four".