81748084752 has 120 divisors (see below), whose sum is σ = 242544357120. Its totient is φ = 25657585920.

The previous prime is 81748084727. The next prime is 81748084753. The reversal of 81748084752 is 25748084718.

81748084752 is a `hidden beast` number, since 8 + 17 + 480 + 84 + 75 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (81748084753) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82302 + ... + 412637.

It is an arithmetic number, because the mean of its divisors is an integer number (2021202976).

Almost surely, 2^81748084752 is an apocalyptic number.

It is an amenable number.

81748084752 is an abundant number, since it is smaller than the sum of its proper divisors (160796272368).

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

81748084752 is a wasteful number, since it uses less digits than its factorization.

81748084752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495021 (or 495012 counting only the distinct ones).

The product of its (nonzero) digits is 4014080, while the sum is 54.

The spelling of 81748084752 in words is "eighty-one billion, seven hundred forty-eight million, eighty-four thousand, seven hundred fifty-two".