81423416360 has 64 divisors (see below), whose sum is σ = 215231143680. Its totient is φ = 27330935040.

The previous prime is 81423416329. The next prime is 81423416369. The reversal of 81423416360 is 6361432418.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81423416369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7111712 + ... + 7123151.

It is an arithmetic number, because the mean of its divisors is an integer number (3362986620).

Almost surely, 2^81423416360 is an apocalyptic number.

It is an amenable number.

81423416360 is an abundant number, since it is smaller than the sum of its proper divisors (133807727320).

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

81423416360 is a wasteful number, since it uses less digits than its factorization.

81423416360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14234898 (or 14234894 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

Adding to 81423416360 its reverse (6361432418), we get a palindrome (87784848778).

The spelling of 81423416360 in words is "eighty-one billion, four hundred twenty-three million, four hundred sixteen thousand, three hundred sixty".