81710486 has 24 divisors (see below), whose sum is σ = 144791064. Its totient is φ = 34282560.

The previous prime is 81710441. The next prime is 81710501. The reversal of 81710486 is 68401718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7271 + ... + 14706.

It is an arithmetic number, because the mean of its divisors is an integer number (6032961).

Almost surely, 2^81710486 is an apocalyptic number.

81710486 is a deficient number, since it is larger than the sum of its proper divisors (63080578).

81710486 is a wasteful number, since it uses less digits than its factorization.

81710486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22016 (or 22003 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 81710486 is about 9039.3852667092. The cubic root of 81710486 is about 433.9362496351.

The spelling of 81710486 in words is "eighty-one million, seven hundred ten thousand, four hundred eighty-six".