81546704 has 20 divisors (see below), whose sum is σ = 161851620. Its totient is φ = 39778560.

The previous prime is 81546697. The next prime is 81546743. The reversal of 81546704 is 40764518.

It can be written as a sum of positive squares in 2 ways, for example, as 8410000 + 73136704 = 2900^2 + 8552^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61499 + ... + 62810.

It is an arithmetic number, because the mean of its divisors is an integer number (8092581).

Almost surely, 2^81546704 is an apocalyptic number.

It is an amenable number.

81546704 is a deficient number, since it is larger than the sum of its proper divisors (80304916).

81546704 is a wasteful number, since it uses less digits than its factorization.

81546704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124358 (or 124352 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 81546704 is about 9030.3213674819. The cubic root of 81546704 is about 433.6461257739.

The spelling of 81546704 in words is "eighty-one million, five hundred forty-six thousand, seven hundred four".