654216605 has 16 divisors (see below), whose sum is σ = 898007040. Its totient is φ = 448207872.

The previous prime is 654216601. The next prime is 654216631. The reversal of 654216605 is 506612456.

It is not a de Polignac number, because 654216605 - 2² = 654216601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654216601) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 34916 + ... + 50274.

It is an arithmetic number, because the mean of its divisors is an integer number (56125440).

Almost surely, 2^654216605 is an apocalyptic number.

It is an amenable number.

654216605 is a deficient number, since it is larger than the sum of its proper divisors (243790435).

654216605 is a wasteful number, since it uses less digits than its factorization.

654216605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16588.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 654216605 is about 25577.6583173675. The cubic root of 654216605 is about 868.1081916326.

The spelling of 654216605 in words is "six hundred fifty-four million, two hundred sixteen thousand, six hundred five".