81040362662 has 8 divisors (see below), whose sum is σ = 138926336016. Its totient is φ = 34731583992.

The previous prime is 81040362631. The next prime is 81040362749. The reversal of 81040362662 is 26626304018.

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, 2894298653 + ... + 2894298680.

It is an arithmetic number, because the mean of its divisors is an integer number (17365792002).

Almost surely, 2^81040362662 is an apocalyptic number.

81040362662 is a deficient number, since it is larger than the sum of its proper divisors (57885973354).

81040362662 is a wasteful number, since it uses less digits than its factorization.

81040362662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5788597342.

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 81040362662 in words is "eighty-one billion, forty million, three hundred sixty-two thousand, six hundred sixty-two".