81146611 has 32 divisors (see below), whose sum is σ = 104711040. Its totient is φ = 61157376.

The previous prime is 81146609. The next prime is 81146617. The reversal of 81146611 is 11664118.

It is not a de Polignac number, because 81146611 - 2¹ = 81146609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81146611.

It is not an unprimeable number, because it can be changed into a prime (81146617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255825 + ... + 256141.

It is an arithmetic number, because the mean of its divisors is an integer number (3272220).

Almost surely, 2^81146611 is an apocalyptic number.

81146611 is a deficient number, since it is larger than the sum of its proper divisors (23564429).

81146611 is a wasteful number, since it uses less digits than its factorization.

81146611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its digits is 1152, while the sum is 28.

The square root of 81146611 is about 9008.1413732246. The cubic root of 81146611 is about 432.9357627026.

The spelling of 81146611 in words is "eighty-one million, one hundred forty-six thousand, six hundred eleven".