81030385446486 has 128 divisors (see below), whose sum is σ = 196272230630400. Its totient is φ = 21771348480000.

The previous prime is 81030385446443. The next prime is 81030385446487. The reversal of 81030385446486 is 68464458303018.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81030385446487) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7643649586 + ... + 7643660186.

It is an arithmetic number, because the mean of its divisors is an integer number (1533376801800).

Almost surely, 2^{81030385446486} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81030385446486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98136115315200).

81030385446486 is an abundant number, since it is smaller than the sum of its proper divisors (115241845183914).

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

81030385446486 is a wasteful number, since it uses less digits than its factorization.

81030385446486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18630.

The product of its (nonzero) digits is 53084160, while the sum is 60.

The spelling of 81030385446486 in words is "eighty-one trillion, thirty billion, three hundred eighty-five million, four hundred forty-six thousand, four hundred eighty-six".