81457341183758 has 16 divisors (see below), whose sum is σ = 126223119728640. Its totient is φ = 39384960101400.

The previous prime is 81457341183703. The next prime is 81457341183781. The reversal of 81457341183758 is 85738114375418.

81457341183758 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 81457341183694 and 81457341183703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497957678 + ... + 498121233.

It is an arithmetic number, because the mean of its divisors is an integer number (7888944983040).

Almost surely, 2^{81457341183758} is an apocalyptic number.

81457341183758 is a deficient number, since it is larger than the sum of its proper divisors (44765778544882).

81457341183758 is a wasteful number, since it uses less digits than its factorization.

81457341183758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996080263.

The product of its digits is 90316800, while the sum is 65.

The spelling of 81457341183758 in words is "eighty-one trillion, four hundred fifty-seven billion, three hundred forty-one million, one hundred eighty-three thousand, seven hundred fifty-eight".