81080158 has 8 divisors (see below), whose sum is σ = 122801328. Its totient is φ = 40146384.

The previous prime is 81080141. The next prime is 81080171. The reversal of 81080158 is 85108018.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196591 + ... + 197002.

It is an arithmetic number, because the mean of its divisors is an integer number (15350166).

Almost surely, 2^81080158 is an apocalyptic number.

81080158 is a deficient number, since it is larger than the sum of its proper divisors (41721170).

81080158 is a wasteful number, since it uses less digits than its factorization.

81080158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393698.

The product of its (nonzero) digits is 2560, while the sum is 31.

The square root of 81080158 is about 9004.4521210343. The cubic root of 81080158 is about 432.8175497671.

The spelling of 81080158 in words is "eighty-one million, eighty thousand, one hundred fifty-eight".