81084489496 has 32 divisors (see below), whose sum is σ = 152666791200. Its totient is φ = 40373555200.

The previous prime is 81084489413. The next prime is 81084489511. The reversal of 81084489496 is 69498448018.

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, 3290421 + ... + 3314971.

It is an arithmetic number, because the mean of its divisors is an integer number (4770837225).

Almost surely, 2^81084489496 is an apocalyptic number.

It is an amenable number.

81084489496 is a deficient number, since it is larger than the sum of its proper divisors (71582301704).

81084489496 is a wasteful number, since it uses less digits than its factorization.

81084489496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26259 (or 26255 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 61.

The spelling of 81084489496 in words is "eighty-one billion, eighty-four million, four hundred eighty-nine thousand, four hundred ninety-six".