81489463050 has 48 divisors (see below), whose sum is σ = 202163176800. Its totient is φ = 21723071040.

The previous prime is 81489463049. The next prime is 81489463051. The reversal of 81489463050 is 5036498418.

It is an interprime number because it is at equal distance from previous prime (81489463049) and next prime (81489463051).

It is not an unprimeable number, because it can be changed into a prime (81489463051) by changing a digit.

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, 352776 + ... + 536124.

It is an arithmetic number, because the mean of its divisors is an integer number (4211732850).

Almost surely, 2^81489463050 is an apocalyptic number.

81489463050 is an abundant number, since it is smaller than the sum of its proper divisors (120673713750).

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

81489463050 is a wasteful number, since it uses less digits than its factorization.

81489463050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186327 (or 186322 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 81489463050 in words is "eighty-one billion, four hundred eighty-nine million, four hundred sixty-three thousand, fifty".