81467755 has 4 divisors (see below), whose sum is σ = 97761312. Its totient is φ = 65174200.

The previous prime is 81467753. The next prime is 81467759. The reversal of 81467755 is 55776418.

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

It is not a de Polignac number, because 81467755 - 2¹ = 81467753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81467753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8146771 + ... + 8146780.

It is an arithmetic number, because the mean of its divisors is an integer number (24440328).

Almost surely, 2^81467755 is an apocalyptic number.

81467755 is a deficient number, since it is larger than the sum of its proper divisors (16293557).

81467755 is a wasteful number, since it uses less digits than its factorization.

81467755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16293556.

The product of its digits is 235200, while the sum is 43.

The square root of 81467755 is about 9025.9489805782. The cubic root of 81467755 is about 433.5061365379.

The spelling of 81467755 in words is "eighty-one million, four hundred sixty-seven thousand, seven hundred fifty-five".