81935632 has 20 divisors (see below), whose sum is σ = 158936256. Its totient is φ = 40919840.

The previous prime is 81935629. The next prime is 81935669. The reversal of 81935632 is 23653918.

It is a junction number, because it is equal to n+sod(n) for n = 81935591 and 81935600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14013 + ... + 18979.

Almost surely, 2^81935632 is an apocalyptic number.

It is an amenable number.

81935632 is a deficient number, since it is larger than the sum of its proper divisors (77000624).

81935632 is a wasteful number, since it uses less digits than its factorization.

81935632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6006 (or 6000 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 81935632 is about 9051.8303121523. The cubic root of 81935632 is about 434.3344417525.

The spelling of 81935632 in words is "eighty-one million, nine hundred thirty-five thousand, six hundred thirty-two".