161043963632 has 40 divisors (see below), whose sum is σ = 319673935392. Its totient is φ = 78547968000.

The previous prime is 161043963623. The next prime is 161043963637. The reversal of 161043963632 is 236369340161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161043963637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9438533 + ... + 9455579.

Almost surely, 2^161043963632 is an apocalyptic number.

It is an amenable number.

161043963632 is a deficient number, since it is larger than the sum of its proper divisors (158629971760).

161043963632 is a wasteful number, since it uses less digits than its factorization.

161043963632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31497 (or 31491 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 44.

The spelling of 161043963632 in words is "one hundred sixty-one billion, forty-three million, nine hundred sixty-three thousand, six hundred thirty-two".