161055045 has 24 divisors (see below), whose sum is σ = 279498336. Its totient is φ = 85792608.

The previous prime is 161055031. The next prime is 161055049. The reversal of 161055045 is 540550161.

It is a happy number.

161055045 is a `hidden beast` number, since 1 + 610 + 5 + 5 + 0 + 45 = 666.

It is not a de Polignac number, because 161055045 - 2⁶ = 161054981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161055049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48942 + ... + 52128.

It is an arithmetic number, because the mean of its divisors is an integer number (11645764).

Almost surely, 2^161055045 is an apocalyptic number.

161055045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161055045 is a deficient number, since it is larger than the sum of its proper divisors (118443291).

161055045 is a wasteful number, since it uses less digits than its factorization.

161055045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4321 (or 4318 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 161055045 is about 12690.7464319480. The cubic root of 161055045 is about 544.0741737186.

The spelling of 161055045 in words is "one hundred sixty-one million, fifty-five thousand, forty-five".