161737664 has 56 divisors (see below), whose sum is σ = 361468416. Its totient is φ = 71136000.

The previous prime is 161737637. The next prime is 161737687. The reversal of 161737664 is 466737161.

161737664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18119 + ... + 25529.

Almost surely, 2^161737664 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 161737664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180734208).

161737664 is an abundant number, since it is smaller than the sum of its proper divisors (199730752).

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

161737664 is a wasteful number, since it uses less digits than its factorization.

161737664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7465 (or 7455 counting only the distinct ones).

The product of its digits is 127008, while the sum is 41.

The square root of 161737664 is about 12717.6123545263. The cubic root of 161737664 is about 544.8417619895.

The spelling of 161737664 in words is "one hundred sixty-one million, seven hundred thirty-seven thousand, six hundred sixty-four".