81044487552000 has 352 divisors, whose sum is σ = 308096418539520. Its totient is φ = 18524453683200.

The previous prime is 81044487551957. The next prime is 81044487552019. The reversal of 81044487552000 is 25578444018.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12387240 + ... + 17763239.

Almost surely, 2^{81044487552000} is an apocalyptic number.

81044487552000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81044487552000 is an abundant number, since it is smaller than the sum of its proper divisors (227051930987520).

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

81044487552000 is a wasteful number, since it uses less digits than its factorization.

81044487552000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30150524 (or 30150496 counting only the distinct ones).

The product of its (nonzero) digits is 1433600, while the sum is 48.

The spelling of 81044487552000 in words is "eighty-one trillion, forty-four billion, four hundred eighty-seven million, five hundred fifty-two thousand".