654543651 has 4 divisors (see below), whose sum is σ = 872724872. Its totient is φ = 436362432.

The previous prime is 654543629. The next prime is 654543713. The reversal of 654543651 is 156345456.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 654543651 - 2⁷ = 654543523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654543451) by changing a digit.

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, 109090606 + ... + 109090611.

It is an arithmetic number, because the mean of its divisors is an integer number (218181218).

Almost surely, 2^654543651 is an apocalyptic number.

654543651 is a deficient number, since it is larger than the sum of its proper divisors (218181221).

654543651 is a wasteful number, since it uses less digits than its factorization.

654543651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218181220.

The product of its digits is 216000, while the sum is 39.

The square root of 654543651 is about 25584.0507152405. The cubic root of 654543651 is about 868.2528246757.

The spelling of 654543651 in words is "six hundred fifty-four million, five hundred forty-three thousand, six hundred fifty-one".