1213641337552 has 80 divisors (see below), whose sum is σ = 2738616284800. Its totient is φ = 510254277120.

The previous prime is 1213641337529. The next prime is 1213641337721. The reversal of 1213641337552 is 2557331463121.

It is a junction number, because it is equal to n+sod(n) for n = 1213641337499 and 1213641337508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2354974 + ... + 2823682.

It is an arithmetic number, because the mean of its divisors is an integer number (34232703560).

Almost surely, 2^{1213641337552} 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 1213641337552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1369308142400).

1213641337552 is an abundant number, since it is smaller than the sum of its proper divisors (1524974947248).

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

1213641337552 is a wasteful number, since it uses less digits than its factorization.

1213641337552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469164 (or 469158 counting only the distinct ones).

The product of its digits is 453600, while the sum is 43.

The spelling of 1213641337552 in words is "one trillion, two hundred thirteen billion, six hundred forty-one million, three hundred thirty-seven thousand, five hundred fifty-two".