161503330544 has 20 divisors (see below), whose sum is σ = 320189743896. Its totient is φ = 78873719232.

The previous prime is 161503330517. The next prime is 161503330553. The reversal of 161503330544 is 445033305161.

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, 117370919 + ... + 117372294.

Almost surely, 2^161503330544 is an apocalyptic number.

It is an amenable number.

161503330544 is a deficient number, since it is larger than the sum of its proper divisors (158686413352).

161503330544 is a wasteful number, since it uses less digits than its factorization.

161503330544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234743264 (or 234743258 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 161503330544 in words is "one hundred sixty-one billion, five hundred three million, three hundred thirty thousand, five hundred forty-four".