81755676 has 48 divisors (see below), whose sum is σ = 212692480. Its totient is φ = 27157680.

The previous prime is 81755671. The next prime is 81755717. The reversal of 81755676 is 67655718.

81755676 is a `hidden beast` number, since 81 + 7 + 5 + 567 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81755671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34605 + ... + 36891.

Almost surely, 2^81755676 is an apocalyptic number.

It is an amenable number.

81755676 is an abundant number, since it is smaller than the sum of its proper divisors (130936804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81755676 is a wasteful number, since it uses less digits than its factorization.

81755676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631 (or 2623 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 81755676 is about 9041.8845380816. The cubic root of 81755676 is about 434.0162310677.

The spelling of 81755676 in words is "eighty-one million, seven hundred fifty-five thousand, six hundred seventy-six".