161244878 has 4 divisors (see below), whose sum is σ = 241867320. Its totient is φ = 80622438.

The previous prime is 161244871. The next prime is 161244911. The reversal of 161244878 is 878442161.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161244871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40311218 + ... + 40311221.

It is an arithmetic number, because the mean of its divisors is an integer number (60466830).

Almost surely, 2^161244878 is an apocalyptic number.

161244878 is a deficient number, since it is larger than the sum of its proper divisors (80622442).

161244878 is an equidigital number, since it uses as much as digits as its factorization.

161244878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80622441.

The product of its digits is 86016, while the sum is 41.

The square root of 161244878 is about 12698.2234190457. The cubic root of 161244878 is about 544.2878536227.

The spelling of 161244878 in words is "one hundred sixty-one million, two hundred forty-four thousand, eight hundred seventy-eight".