81755006 has 16 divisors (see below), whose sum is σ = 131978160. Its totient is φ = 37841280.

The previous prime is 81754999. The next prime is 81755033. The reversal of 81755006 is 60055718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17636 + ... + 21783.

It is an arithmetic number, because the mean of its divisors is an integer number (8248635).

Almost surely, 2^81755006 is an apocalyptic number.

81755006 is a deficient number, since it is larger than the sum of its proper divisors (50223154).

81755006 is a wasteful number, since it uses less digits than its factorization.

81755006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39499.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 81755006 is about 9041.8474882073. The cubic root of 81755006 is about 434.0150454552.

The spelling of 81755006 in words is "eighty-one million, seven hundred fifty-five thousand, six".