81537127846 has 32 divisors (see below), whose sum is σ = 133301285280. Its totient is φ = 37248846336.

The previous prime is 81537127831. The next prime is 81537127849. The reversal of 81537127846 is 64872173518.

It is a junction number, because it is equal to n+sod(n) for n = 81537127793 and 81537127802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81537127849) 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, 484140 + ... + 630448.

It is an arithmetic number, because the mean of its divisors is an integer number (4165665165).

Almost surely, 2^81537127846 is an apocalyptic number.

81537127846 is a deficient number, since it is larger than the sum of its proper divisors (51764157434).

81537127846 is a wasteful number, since it uses less digits than its factorization.

81537127846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146808.

The product of its digits is 2257920, while the sum is 52.

The spelling of 81537127846 in words is "eighty-one billion, five hundred thirty-seven million, one hundred twenty-seven thousand, eight hundred forty-six".