81084426432 has 56 divisors (see below), whose sum is σ = 214579200000. Its totient is φ = 27022684416.

The previous prime is 81084426421. The next prime is 81084426439. The reversal of 81084426432 is 23462448018.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81084426439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 973569 + ... + 1053567.

Almost surely, 2^81084426432 is an apocalyptic number.

It is an amenable number.

81084426432 is an abundant number, since it is smaller than the sum of its proper divisors (133494773568).

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

81084426432 is a wasteful number, since it uses less digits than its factorization.

81084426432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85293 (or 85283 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 42.

The spelling of 81084426432 in words is "eighty-one billion, eighty-four million, four hundred twenty-six thousand, four hundred thirty-two".