81086380459 has 6 divisors (see below), whose sum is σ = 94324973244. Its totient is φ = 69502611780.

The previous prime is 81086380457. The next prime is 81086380493. The reversal of 81086380459 is 95408368018.

It is not a de Polignac number, because 81086380459 - 2¹ = 81086380457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81086380457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 827411997 + ... + 827412094.

It is an arithmetic number, because the mean of its divisors is an integer number (15720828874).

Almost surely, 2^81086380459 is an apocalyptic number.

81086380459 is a deficient number, since it is larger than the sum of its proper divisors (13238592785).

81086380459 is a wasteful number, since it uses less digits than its factorization.

81086380459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654824105 (or 1654824098 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 81086380459 in words is "eighty-one billion, eighty-six million, three hundred eighty thousand, four hundred fifty-nine".