81547460466 has 16 divisors (see below), whose sum is σ = 167502892224. Its totient is φ = 26447824944.

The previous prime is 81547460453. The next prime is 81547460521. The reversal of 81547460466 is 66406474518.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183665230 + ... + 183665673.

It is an arithmetic number, because the mean of its divisors is an integer number (10468930764).

Almost surely, 2^81547460466 is an apocalyptic number.

81547460466 is an abundant number, since it is smaller than the sum of its proper divisors (85955431758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81547460466 is a wasteful number, since it uses less digits than its factorization.

81547460466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367330945.

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 81547460466 in words is "eighty-one billion, five hundred forty-seven million, four hundred sixty thousand, four hundred sixty-six".