81748084750 has 32 divisors (see below), whose sum is σ = 156591328608. Its totient is φ = 31938782400.

The previous prime is 81748084727. The next prime is 81748084753. The reversal of 81748084750 is 5748084718.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3791487 + ... + 3812986.

It is an arithmetic number, because the mean of its divisors is an integer number (4893479019).

Almost surely, 2^81748084750 is an apocalyptic number.

81748084750 is a deficient number, since it is larger than the sum of its proper divisors (74843243858).

81748084750 is a wasteful number, since it uses less digits than its factorization.

81748084750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7604533 (or 7604523 counting only the distinct ones).

The product of its (nonzero) digits is 2007040, while the sum is 52.

The spelling of 81748084750 in words is "eighty-one billion, seven hundred forty-eight million, eighty-four thousand, seven hundred fifty".