81736058 has 4 divisors (see below), whose sum is σ = 122604090. Its totient is φ = 40868028.

The previous prime is 81736049. The next prime is 81736069. The reversal of 81736058 is 85063718.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 66471409 + 15264649 = 8153^2 + 3907^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20434013 + ... + 20434016.

Almost surely, 2^81736058 is an apocalyptic number.

81736058 is a deficient number, since it is larger than the sum of its proper divisors (40868032).

81736058 is a wasteful number, since it uses less digits than its factorization.

81736058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40868031.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 81736058 is about 9040.7996327759. The cubic root of 81736058 is about 433.9815129418.

The spelling of 81736058 in words is "eighty-one million, seven hundred thirty-six thousand, fifty-eight".