81742941708 has 24 divisors (see below), whose sum is σ = 191552136048. Its totient is φ = 27130703616.

The previous prime is 81742941647. The next prime is 81742941713. The reversal of 81742941708 is 80714924718.

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, 14615041 + ... + 14620632.

It is an arithmetic number, because the mean of its divisors is an integer number (7981339002).

Almost surely, 2^81742941708 is an apocalyptic number.

It is an amenable number.

81742941708 is an abundant number, since it is smaller than the sum of its proper divisors (109809194340).

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

81742941708 is a wasteful number, since it uses less digits than its factorization.

81742941708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29235913 (or 29235911 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 51.

The spelling of 81742941708 in words is "eighty-one billion, seven hundred forty-two million, nine hundred forty-one thousand, seven hundred eight".