81050586 has 32 divisors (see below), whose sum is σ = 165288768. Its totient is φ = 26490240.

The previous prime is 81050569. The next prime is 81050591. The reversal of 81050586 is 68505018.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91980 + ... + 92856.

It is an arithmetic number, because the mean of its divisors is an integer number (5165274).

Almost surely, 2^81050586 is an apocalyptic number.

81050586 is an abundant number, since it is smaller than the sum of its proper divisors (84238182).

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

81050586 is a wasteful number, since it uses less digits than its factorization.

81050586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166.

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 81050586 is about 9002.8098946940. The cubic root of 81050586 is about 432.7649235049.

The spelling of 81050586 in words is "eighty-one million, fifty thousand, five hundred eighty-six".