81538160333 has 16 divisors (see below), whose sum is σ = 95210096640. Its totient is φ = 68384131200.

The previous prime is 81538160323. The next prime is 81538160357. The reversal of 81538160333 is 33306183518.

It is not a de Polignac number, because 81538160333 - 2¹⁶ = 81538094797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81538160323) 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, 418328 + ... + 581441.

It is an arithmetic number, because the mean of its divisors is an integer number (5950631040).

Almost surely, 2^81538160333 is an apocalyptic number.

It is an amenable number.

81538160333 is a deficient number, since it is larger than the sum of its proper divisors (13671936307).

81538160333 is a wasteful number, since it uses less digits than its factorization.

81538160333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000028.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 81538160333 in words is "eighty-one billion, five hundred thirty-eight million, one hundred sixty thousand, three hundred thirty-three".