81752615371 has 16 divisors (see below), whose sum is σ = 96462213120. Its totient is φ = 67801465440.

The previous prime is 81752615333. The next prime is 81752615411. The reversal of 81752615371 is 17351625718.

It is a cyclic number.

It is not a de Polignac number, because 81752615371 - 2⁹ = 81752614859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81752675371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1356930 + ... + 1415896.

It is an arithmetic number, because the mean of its divisors is an integer number (6028888320).

Almost surely, 2^81752615371 is an apocalyptic number.

81752615371 is a deficient number, since it is larger than the sum of its proper divisors (14709597749).

81752615371 is a wasteful number, since it uses less digits than its factorization.

81752615371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65394.

The product of its digits is 352800, while the sum is 46.

The spelling of 81752615371 in words is "eighty-one billion, seven hundred fifty-two million, six hundred fifteen thousand, three hundred seventy-one".