81609080484 has 12 divisors (see below), whose sum is σ = 190421187824. Its totient is φ = 27203026824.

The previous prime is 81609080479. The next prime is 81609080489. The reversal of 81609080484 is 48408090618.

It is an interprime number because it is at equal distance from previous prime (81609080479) and next prime (81609080489).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (81609080489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3400378342 + ... + 3400378365.

Almost surely, 2^81609080484 is an apocalyptic number.

It is an amenable number.

81609080484 is an abundant number, since it is smaller than the sum of its proper divisors (108812107340).

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

81609080484 is a wasteful number, since it uses less digits than its factorization.

81609080484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6800756714 (or 6800756712 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The spelling of 81609080484 in words is "eighty-one billion, six hundred nine million, eighty thousand, four hundred eighty-four".