81162006 has 16 divisors (see below), whose sum is σ = 162502848. Its totient is φ = 27024200.

The previous prime is 81161989. The next prime is 81162007. The reversal of 81162006 is 60026118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81162007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1140 + ... + 12791.

It is an arithmetic number, because the mean of its divisors is an integer number (10156428).

Almost surely, 2^81162006 is an apocalyptic number.

81162006 is an abundant number, since it is smaller than the sum of its proper divisors (81340842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81162006 is a wasteful number, since it uses less digits than its factorization.

81162006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14907.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 81162006 is about 9008.9958374949. The cubic root of 81162006 is about 432.9631395888.

The spelling of 81162006 in words is "eighty-one million, one hundred sixty-two thousand, six".