81654411 has 8 divisors (see below), whose sum is σ = 111528144. Its totient is φ = 53108480.

The previous prime is 81654389. The next prime is 81654431. The reversal of 81654411 is 11445618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81654411 - 2⁵ = 81654379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81654431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331806 + ... + 332051.

It is an arithmetic number, because the mean of its divisors is an integer number (13941018).

Almost surely, 2^81654411 is an apocalyptic number.

81654411 is a deficient number, since it is larger than the sum of its proper divisors (29873733).

81654411 is a wasteful number, since it uses less digits than its factorization.

81654411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663901.

The product of its digits is 3840, while the sum is 30.

The square root of 81654411 is about 9036.2830300959. The cubic root of 81654411 is about 433.8369619149.

The spelling of 81654411 in words is "eighty-one million, six hundred fifty-four thousand, four hundred eleven".