81046689024 has 288 divisors, whose sum is σ = 260522680320. Its totient is φ = 21866397696.

The previous prime is 81046688999. The next prime is 81046689029. The reversal of 81046689024 is 42098664018.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81046689029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9764044 + ... + 9772340.

It is an arithmetic number, because the mean of its divisors is an integer number (904592640).

Almost surely, 2^81046689024 is an apocalyptic number.

81046689024 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81046689024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130261340160).

81046689024 is an abundant number, since it is smaller than the sum of its proper divisors (179475991296).

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

81046689024 is a wasteful number, since it uses less digits than its factorization.

81046689024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8425 (or 8411 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 81046689024 in words is "eighty-one billion, forty-six million, six hundred eighty-nine thousand, twenty-four".