81752510424624 has 160 divisors (see below), whose sum is σ = 227831536848384. Its totient is φ = 25111298488320.

The previous prime is 81752510424619. The next prime is 81752510424707. The reversal of 81752510424624 is 42642401525718.

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, 1803195684 + ... + 1803241020.

Almost surely, 2^{81752510424624} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81752510424624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113915768424192).

81752510424624 is an abundant number, since it is smaller than the sum of its proper divisors (146079026423760).

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

81752510424624 is a wasteful number, since it uses less digits than its factorization.

81752510424624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50275 (or 50269 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 51.

The spelling of 81752510424624 in words is "eighty-one trillion, seven hundred fifty-two billion, five hundred ten million, four hundred twenty-four thousand, six hundred twenty-four".