81593170476 has 12 divisors (see below), whose sum is σ = 190384064472. Its totient is φ = 27197723488.

The previous prime is 81593170433. The next prime is 81593170507. The reversal of 81593170476 is 67407139518.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3399715425 + ... + 3399715448.

It is an arithmetic number, because the mean of its divisors is an integer number (15865338706).

Almost surely, 2^81593170476 is an apocalyptic number.

It is an amenable number.

81593170476 is an abundant number, since it is smaller than the sum of its proper divisors (108790893996).

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

81593170476 is a wasteful number, since it uses less digits than its factorization.

81593170476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6799430880 (or 6799430878 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 81593170476 in words is "eighty-one billion, five hundred ninety-three million, one hundred seventy thousand, four hundred seventy-six".