81264850050 has 48 divisors (see below), whose sum is σ = 210299307840. Its totient is φ = 20728424640.

The previous prime is 81264849983. The next prime is 81264850091. The reversal of 81264850050 is 5005846218.

It is a junction number, because it is equal to n+sod(n) for n = 81264849990 and 81264850008.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11774065 + ... + 11780964.

It is an arithmetic number, because the mean of its divisors is an integer number (4381235580).

Almost surely, 2^81264850050 is an apocalyptic number.

81264850050 is an abundant number, since it is smaller than the sum of its proper divisors (129034457790).

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

81264850050 is a wasteful number, since it uses less digits than its factorization.

81264850050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23555067 (or 23555062 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 39.

The spelling of 81264850050 in words is "eighty-one billion, two hundred sixty-four million, eight hundred fifty thousand, fifty".