81161614 has 8 divisors (see below), whose sum is σ = 121851648. Its totient is φ = 40544400.

The previous prime is 81161611. The next prime is 81161653. The reversal of 81161614 is 41616118.

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 (81161611) 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, 15327 + ... + 19930.

It is an arithmetic number, because the mean of its divisors is an integer number (15231456).

Almost surely, 2^81161614 is an apocalyptic number.

81161614 is a deficient number, since it is larger than the sum of its proper divisors (40690034).

81161614 is a wasteful number, since it uses less digits than its factorization.

81161614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36410.

The product of its digits is 1152, while the sum is 28.

The square root of 81161614 is about 9008.9740814368. The cubic root of 81161614 is about 432.9624425393.

It can be divided in two parts, 8116 and 1614, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 81161614 in words is "eighty-one million, one hundred sixty-one thousand, six hundred fourteen".