81758171626112 has 32 divisors (see below), whose sum is σ = 164120948085600. Its totient is φ = 40567031714560.

The previous prime is 81758171626099. The next prime is 81758171626121. The reversal of 81758171626112 is 21162617185718.

It is a tau number, because it is divible by the number of its divisors (32).

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, 2437905812 + ... + 2437939347.

It is an arithmetic number, because the mean of its divisors is an integer number (5128779627675).

Almost surely, 2^{81758171626112} is an apocalyptic number.

It is an amenable number.

81758171626112 is an abundant number, since it is smaller than the sum of its proper divisors (82362776459488).

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

81758171626112 is a wasteful number, since it uses less digits than its factorization.

81758171626112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4875845304 (or 4875845292 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 56.

The spelling of 81758171626112 in words is "eighty-one trillion, seven hundred fifty-eight billion, one hundred seventy-one million, six hundred twenty-six thousand, one hundred twelve".