161544744 has 96 divisors (see below), whose sum is σ = 466352640. Its totient is φ = 50342400.

The previous prime is 161544737. The next prime is 161544767. The reversal of 161544744 is 447445161.

161544744 = T₄₃₅₁ + T₄₃₅₂ + ... + T₄₃₆₇.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 161544699 and 161544708.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 233439 + ... + 234129.

It is an arithmetic number, because the mean of its divisors is an integer number (4857840).

Almost surely, 2^161544744 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 161544744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233176320).

161544744 is an abundant number, since it is smaller than the sum of its proper divisors (304807896).

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

161544744 is a wasteful number, since it uses less digits than its factorization.

161544744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911 (or 904 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 161544744 is about 12710.0253343571. The cubic root of 161544744 is about 544.6250474865.

The spelling of 161544744 in words is "one hundred sixty-one million, five hundred forty-four thousand, seven hundred forty-four".