161473845 has 16 divisors (see below), whose sum is σ = 278232192. Its totient is φ = 79494720.

The previous prime is 161473843. The next prime is 161473859. The reversal of 161473845 is 548374161.

It is not a de Polignac number, because 161473845 - 2¹ = 161473843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161473843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413841 + ... + 414230.

It is an arithmetic number, because the mean of its divisors is an integer number (17389512).

Almost surely, 2^161473845 is an apocalyptic number.

161473845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161473845 is a deficient number, since it is larger than the sum of its proper divisors (116758347).

161473845 is a wasteful number, since it uses less digits than its factorization.

161473845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828092.

The product of its digits is 80640, while the sum is 39.

The square root of 161473845 is about 12707.2359307601. The cubic root of 161473845 is about 544.5453605413.

The spelling of 161473845 in words is "one hundred sixty-one million, four hundred seventy-three thousand, eight hundred forty-five".