81080650499 has 8 divisors (see below), whose sum is σ = 81338052528. Its totient is φ = 80823385600.

The previous prime is 81080650487. The next prime is 81080650507. The reversal of 81080650499 is 99405608018.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81080650499 - 2¹² = 81080646403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81080650439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1222799 + ... + 1287399.

It is an arithmetic number, because the mean of its divisors is an integer number (10167256566).

Almost surely, 2^81080650499 is an apocalyptic number.

81080650499 is a deficient number, since it is larger than the sum of its proper divisors (257402029).

81080650499 is a wasteful number, since it uses less digits than its factorization.

81080650499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68565.

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 81080650499 in words is "eighty-one billion, eighty million, six hundred fifty thousand, four hundred ninety-nine".