161081678 has 8 divisors (see below), whose sum is σ = 241712760. Its totient is φ = 80510760.

The previous prime is 161081671. The next prime is 161081693. The reversal of 161081678 is 876180161.

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 (161081671) 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, 7613 + ... + 19496.

It is an arithmetic number, because the mean of its divisors is an integer number (30214095).

Almost surely, 2^161081678 is an apocalyptic number.

161081678 is a deficient number, since it is larger than the sum of its proper divisors (80631082).

161081678 is a wasteful number, since it uses less digits than its factorization.

161081678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30082.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 161081678 is about 12691.7956964332. The cubic root of 161081678 is about 544.1041624900.

The spelling of 161081678 in words is "one hundred sixty-one million, eighty-one thousand, six hundred seventy-eight".