82988329581 has 12 divisors (see below), whose sum is σ = 120047548608. Its totient is φ = 55244545224.

The previous prime is 82988329577. The next prime is 82988329591. The reversal of 82988329581 is 18592388928.

82988329581 is a `hidden beast` number, since 8 + 29 + 8 + 8 + 3 + 29 + 581 = 666.

It is not a de Polignac number, because 82988329581 - 2² = 82988329577 is a prime.

It is a super-2 number, since 2×82988329581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82988329591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6744165 + ... + 6756458.

It is an arithmetic number, because the mean of its divisors is an integer number (10003962384).

Almost surely, 2^82988329581 is an apocalyptic number.

It is an amenable number.

82988329581 is a deficient number, since it is larger than the sum of its proper divisors (37059219027).

82988329581 is a wasteful number, since it uses less digits than its factorization.

82988329581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13501312 (or 13501309 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 63.

The spelling of 82988329581 in words is "eighty-two billion, nine hundred eighty-eight million, three hundred twenty-nine thousand, five hundred eighty-one".