161455752 has 24 divisors (see below), whose sum is σ = 437276190. Its totient is φ = 53818560.

The previous prime is 161455751. The next prime is 161455757. The reversal of 161455752 is 257554161.

It can be written as a sum of positive squares in only one way, i.e., 160427556 + 1028196 = 12666^2 + 1014^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is not an unprimeable number, because it can be changed into a prime (161455751) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1121149 + ... + 1121292.

Almost surely, 2^161455752 is an apocalyptic number.

161455752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161455752 is an abundant number, since it is smaller than the sum of its proper divisors (275820438).

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

161455752 is a wasteful number, since it uses less digits than its factorization.

161455752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242453 (or 2242446 counting only the distinct ones).

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

The square root of 161455752 is about 12706.5239936027. The cubic root of 161455752 is about 544.5250211746.

The spelling of 161455752 in words is "one hundred sixty-one million, four hundred fifty-five thousand, seven hundred fifty-two".