81741707050 has 12 divisors (see below), whose sum is σ = 152039575206. Its totient is φ = 32696682800.

The previous prime is 81741707039. The next prime is 81741707051. The reversal of 81741707050 is 5070714718.

It can be written as a sum of positive squares in 3 ways, for example, as 29480546601 + 52261160449 = 171699^2 + 228607^2 .

It is a junction number, because it is equal to n+sod(n) for n = 81741706994 and 81741707012.

It is not an unprimeable number, because it can be changed into a prime (81741707051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 817417021 + ... + 817417120.

Almost surely, 2^81741707050 is an apocalyptic number.

81741707050 is a deficient number, since it is larger than the sum of its proper divisors (70297868156).

81741707050 is a wasteful number, since it uses less digits than its factorization.

81741707050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634834153 (or 1634834148 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 40.

The spelling of 81741707050 in words is "eighty-one billion, seven hundred forty-one million, seven hundred seven thousand, fifty".