81469503648000 has 2304 divisors, whose sum is σ = 345566028487680. Its totient is φ = 18724552704000.

The previous prime is 81469503647999. The next prime is 81469503648023. The reversal of 81469503648000 is 84630596418.

81469503648000 is a `hidden beast` number, since 8 + 1 + 46 + 95 + 0 + 36 + 480 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2304).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 25013662372 + ... + 25013665628.

It is an arithmetic number, because the mean of its divisors is an integer number (149985255420).

Almost surely, 2^{81469503648000} is an apocalyptic number.

81469503648000 is a gapful number since it is divisible by the number (80) 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 81469503648000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172783014243840).

81469503648000 is an abundant number, since it is smaller than the sum of its proper divisors (264096524839680).

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

81469503648000 is a wasteful number, since it uses less digits than its factorization.

81469503648000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3458 (or 3428 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 81469503648000 in words is "eighty-one trillion, four hundred sixty-nine billion, five hundred three million, six hundred forty-eight thousand".