8081781718 has 8 divisors (see below), whose sum is σ = 12123753048. Its totient is φ = 4040530704.

The previous prime is 8081781649. The next prime is 8081781731. The reversal of 8081781718 is 8171871808.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151096 + ... + 197467.

It is an arithmetic number, because the mean of its divisors is an integer number (1515469131).

Almost surely, 2^8081781718 is an apocalyptic number.

8081781718 is a deficient number, since it is larger than the sum of its proper divisors (4041971330).

8081781718 is a wasteful number, since it uses less digits than its factorization.

8081781718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360158.

The product of its (nonzero) digits is 200704, while the sum is 49.

The square root of 8081781718 is about 89898.7303469854. The cubic root of 8081781718 is about 2006.7920510769.

The spelling of 8081781718 in words is "eight billion, eighty-one million, seven hundred eighty-one thousand, seven hundred eighteen".