81460857600 has 1080 divisors, whose sum is σ = 321647829888. Its totient is φ = 20304691200.

The previous prime is 81460857593. The next prime is 81460857617. The reversal of 81460857600 is 675806418.

It is a happy number.

81460857600 is a `hidden beast` number, since 8 + 14 + 60 + 8 + 576 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1080).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 594604732 + ... + 594604868.

Almost surely, 2^81460857600 is an apocalyptic number.

81460857600 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 81460857600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160823914944).

81460857600 is an abundant number, since it is smaller than the sum of its proper divisors (240186972288).

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

81460857600 is a wasteful number, since it uses less digits than its factorization.

81460857600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 81460857600 in words is "eighty-one billion, four hundred sixty million, eight hundred fifty-seven thousand, six hundred".