161545752 has 80 divisors (see below), whose sum is σ = 476328600. Its totient is φ = 51010560.

The previous prime is 161545697. The next prime is 161545753. The reversal of 161545752 is 257545161.

161545752 is a `hidden beast` number, since 1 + 61 + 545 + 7 + 52 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161545753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5752 + ... + 18872.

Almost surely, 2^161545752 is an apocalyptic number.

161545752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161545752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238164300).

161545752 is an abundant number, since it is smaller than the sum of its proper divisors (314782848).

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

161545752 is a wasteful number, since it uses less digits than its factorization.

161545752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13158 (or 13145 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 161545752 is about 12710.0649880321. The cubic root of 161545752 is about 544.6261802602.

The spelling of 161545752 in words is "one hundred sixty-one million, five hundred forty-five thousand, seven hundred fifty-two".