161542744 has 48 divisors (see below), whose sum is σ = 340761960. Its totient is φ = 71702400.

The previous prime is 161542741. The next prime is 161542751. The reversal of 161542744 is 447245161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161542741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39684 + ... + 43564.

Almost surely, 2^161542744 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 161542744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170380980).

161542744 is an abundant number, since it is smaller than the sum of its proper divisors (179219216).

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

161542744 is a wasteful number, since it uses less digits than its factorization.

161542744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3952 (or 3937 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 161542744 is about 12709.9466560643. The cubic root of 161542744 is about 544.6227999057.

The spelling of 161542744 in words is "one hundred sixty-one million, five hundred forty-two thousand, seven hundred forty-four".