161441445 has 32 divisors (see below), whose sum is σ = 287121024. Its totient is φ = 76793600.

The previous prime is 161441431. The next prime is 161441447. The reversal of 161441445 is 544144161.

It is not a de Polignac number, because 161441445 - 2⁴ = 161441429 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161441447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 486 + ... + 17975.

It is an arithmetic number, because the mean of its divisors is an integer number (8972532).

Almost surely, 2^161441445 is an apocalyptic number.

161441445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161441445 is a deficient number, since it is larger than the sum of its proper divisors (125679579).

161441445 is a wasteful number, since it uses less digits than its factorization.

161441445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18533.

The product of its digits is 7680, while the sum is 30.

The square root of 161441445 is about 12705.9610026161. The cubic root of 161441445 is about 544.5089367893.

The spelling of 161441445 in words is "one hundred sixty-one million, four hundred forty-one thousand, four hundred forty-five".