1215405343552 has 28 divisors (see below), whose sum is σ = 2494986188580. Its totient is φ = 586747406336.

The previous prime is 1215405343531. The next prime is 1215405343583. The reversal of 1215405343552 is 2553435045121.

It can be written as a sum of positive squares in 2 ways, for example, as 282666608896 + 932738734656 = 531664^2 + 965784^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327424153 + ... + 327427864.

Almost surely, 2^{1215405343552} is an apocalyptic number.

It is an amenable number.

1215405343552 is an abundant number, since it is smaller than the sum of its proper divisors (1279580845028).

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

1215405343552 is an equidigital number, since it uses as much as digits as its factorization.

1215405343552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654852058 (or 654852048 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 1215405343552 in words is "one trillion, two hundred fifteen billion, four hundred five million, three hundred forty-three thousand, five hundred fifty-two".