161461944 has 64 divisors (see below), whose sum is σ = 512582400. Its totient is φ = 46131552.

The previous prime is 161461939. The next prime is 161461987. The reversal of 161461944 is 449164161.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 161461899 and 161461908.

It is a congruent number.

It is an unprimeable number.

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, 51882 + ... + 54905.

It is an arithmetic number, because the mean of its divisors is an integer number (8009100).

Almost surely, 2^161461944 is an apocalyptic number.

161461944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161461944 is an abundant number, since it is smaller than the sum of its proper divisors (351120456).

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

161461944 is a wasteful number, since it uses less digits than its factorization.

161461944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106809 (or 106799 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 161461944 is about 12706.7676456288. The cubic root of 161461944 is about 544.5319821237.

The spelling of 161461944 in words is "one hundred sixty-one million, four hundred sixty-one thousand, nine hundred forty-four".