81030585321 has 48 divisors (see below), whose sum is σ = 139819889664. Its totient is φ = 44214093792.

The previous prime is 81030585313. The next prime is 81030585373. The reversal of 81030585321 is 12358503018.

81030585321 is a `hidden beast` number, since 8 + 10 + 30 + 585 + 32 + 1 = 666.

It is not a de Polignac number, because 81030585321 - 2³ = 81030585313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81030185321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 802930 + ... + 898196.

It is an arithmetic number, because the mean of its divisors is an integer number (2912914368).

Almost surely, 2^81030585321 is an apocalyptic number.

It is an amenable number.

81030585321 is a deficient number, since it is larger than the sum of its proper divisors (58789304343).

81030585321 is a wasteful number, since it uses less digits than its factorization.

81030585321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95890 (or 95887 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 81030585321 in words is "eighty-one billion, thirty million, five hundred eighty-five thousand, three hundred twenty-one".