81655035 has 48 divisors (see below), whose sum is σ = 164145408. Its totient is φ = 33929280.

The previous prime is 81655009. The next prime is 81655087. The reversal of 81655035 is 53055618.

It is not a de Polignac number, because 81655035 - 2⁵ = 81655003 is a prime.

It is a super-3 number, since 3×81655035³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 81654987 and 81655005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9492 + ... + 15918.

It is an arithmetic number, because the mean of its divisors is an integer number (3419696).

Almost surely, 2^81655035 is an apocalyptic number.

81655035 is an abundant number, since it is smaller than the sum of its proper divisors (82490373).

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

81655035 is a wasteful number, since it uses less digits than its factorization.

81655035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6464 (or 6453 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 81655035 is about 9036.3175575010. The cubic root of 81655035 is about 433.8380670341.

The spelling of 81655035 in words is "eighty-one million, six hundred fifty-five thousand, thirty-five".