1543506321552 has 160 divisors (see below), whose sum is σ = 4390094515968. Its totient is φ = 464370935808.

The previous prime is 1543506321491. The next prime is 1543506321601. The reversal of 1543506321552 is 2551236053451.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9610453 + ... + 9769739.

Almost surely, 2^{1543506321552} is an apocalyptic number.

1543506321552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1543506321552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2195047257984).

1543506321552 is an abundant number, since it is smaller than the sum of its proper divisors (2846588194416).

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

1543506321552 is a wasteful number, since it uses less digits than its factorization.

1543506321552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159657 (or 159651 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 42.

The spelling of 1543506321552 in words is "one trillion, five hundred forty-three billion, five hundred six million, three hundred twenty-one thousand, five hundred fifty-two".