81741884384 has 48 divisors (see below), whose sum is σ = 162566756352. Its totient is φ = 40455458688.

The previous prime is 81741884359. The next prime is 81741884407. The reversal of 81741884384 is 48348814718.

It is a super-3 number, since 3×81741884384³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9564017 + ... + 9572559.

It is an arithmetic number, because the mean of its divisors is an integer number (3386807424).

Almost surely, 2^81741884384 is an apocalyptic number.

It is an amenable number.

81741884384 is a deficient number, since it is larger than the sum of its proper divisors (80824871968).

81741884384 is a wasteful number, since it uses less digits than its factorization.

81741884384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11559 (or 11551 counting only the distinct ones).

The product of its digits is 5505024, while the sum is 56.

The spelling of 81741884384 in words is "eighty-one billion, seven hundred forty-one million, eight hundred eighty-four thousand, three hundred eighty-four".