81158162 has 8 divisors (see below), whose sum is σ = 122020992. Its totient is φ = 40484500.

The previous prime is 81158149. The next prime is 81158171. The reversal of 81158162 is 26185118.

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

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, 46214 + ... + 47937.

It is an arithmetic number, because the mean of its divisors is an integer number (15252624).

Almost surely, 2^81158162 is an apocalyptic number.

81158162 is a deficient number, since it is larger than the sum of its proper divisors (40862830).

81158162 is a wasteful number, since it uses less digits than its factorization.

81158162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94584.

The product of its digits is 3840, while the sum is 32.

The square root of 81158162 is about 9008.7824926568. The cubic root of 81158162 is about 432.9563041385.

The spelling of 81158162 in words is "eighty-one million, one hundred fifty-eight thousand, one hundred sixty-two".