81408748000740 has 48 divisors (see below), whose sum is σ = 228298996056768. Its totient is φ = 21675237404544.

The previous prime is 81408748000739. The next prime is 81408748000757. The reversal of 81408748000740 is 4700084780418.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1055025547 + ... + 1055102706.

It is an arithmetic number, because the mean of its divisors is an integer number (4756229084516).

Almost surely, 2^{81408748000740} is an apocalyptic number.

It is an amenable number.

81408748000740 is an abundant number, since it is smaller than the sum of its proper divisors (146890248056028).

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

81408748000740 is a wasteful number, since it uses less digits than its factorization.

81408748000740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110128908 (or 2110128906 counting only the distinct ones).

The product of its (nonzero) digits is 1605632, while the sum is 51.

The spelling of 81408748000740 in words is "eighty-one trillion, four hundred eight billion, seven hundred forty-eight million, seven hundred forty", and thus it is an aban number.