161539678 has 8 divisors (see below), whose sum is σ = 256563072. Its totient is φ = 76018656.

The previous prime is 161539673. The next prime is 161539687. The reversal of 161539678 is 876935161.

It is a happy number.

161539678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161539673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2375550 + ... + 2375617.

It is an arithmetic number, because the mean of its divisors is an integer number (32070384).

Almost surely, 2^161539678 is an apocalyptic number.

161539678 is a deficient number, since it is larger than the sum of its proper divisors (95023394).

161539678 is a wasteful number, since it uses less digits than its factorization.

161539678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751186.

The product of its digits is 272160, while the sum is 46.

The square root of 161539678 is about 12709.8260412958. The cubic root of 161539678 is about 544.6193543284.

The spelling of 161539678 in words is "one hundred sixty-one million, five hundred thirty-nine thousand, six hundred seventy-eight".