81077082 has 16 divisors (see below), whose sum is σ = 162298080. Its totient is φ = 27001712.

The previous prime is 81077081. The next prime is 81077099. The reversal of 81077082 is 28077018.

It is not an unprimeable number, because it can be changed into a prime (81077081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2188 + ... + 12920.

It is an arithmetic number, because the mean of its divisors is an integer number (10143630).

Almost surely, 2^81077082 is an apocalyptic number.

81077082 is an abundant number, since it is smaller than the sum of its proper divisors (81220998).

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

81077082 is a wasteful number, since it uses less digits than its factorization.

81077082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11997.

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 81077082 is about 9004.2813150190. The cubic root of 81077082 is about 432.8120763210.

The spelling of 81077082 in words is "eighty-one million, seventy-seven thousand, eighty-two".