161264444 has 36 divisors (see below), whose sum is σ = 314893992. Its totient is φ = 72193440.

The previous prime is 161264443. The next prime is 161264459. The reversal of 161264444 is 444462161.

It is a self number, because there is not a number n which added to its sum of digits gives 161264444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161264443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29942 + ... + 34914.

Almost surely, 2^161264444 is an apocalyptic number.

It is an amenable number.

161264444 is a deficient number, since it is larger than the sum of its proper divisors (153629548).

161264444 is a wasteful number, since it uses less digits than its factorization.

161264444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5066 (or 5053 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 161264444 is about 12698.9938184094. The cubic root of 161264444 is about 544.3098679766.

The spelling of 161264444 in words is "one hundred sixty-one million, two hundred sixty-four thousand, four hundred forty-four".