161244468 has 72 divisors (see below), whose sum is σ = 508173120. Its totient is φ = 41880960.

The previous prime is 161244449. The next prime is 161244487. The reversal of 161244468 is 864442161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (161244449) and next prime (161244487).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26313 + ... + 31856.

It is an arithmetic number, because the mean of its divisors is an integer number (7057960).

Almost surely, 2^161244468 is an apocalyptic number.

161244468 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161244468 is an abundant number, since it is smaller than the sum of its proper divisors (346928652).

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

161244468 is a wasteful number, since it uses less digits than its factorization.

161244468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58197 (or 58192 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 161244468 is about 12698.2072750448. The cubic root of 161244468 is about 544.2873922991.

The spelling of 161244468 in words is "one hundred sixty-one million, two hundred forty-four thousand, four hundred sixty-eight".