654421641 has 12 divisors (see below), whose sum is σ = 876031632. Its totient is φ = 434553168.

The previous prime is 654421633. The next prime is 654421643. The reversal of 654421641 is 146124456.

It is not a de Polignac number, because 654421641 - 2³ = 654421633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (654421643) 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 11 ways as a sum of consecutive naturals, for example, 228766 + ... + 231608.

It is an arithmetic number, because the mean of its divisors is an integer number (73002636).

Almost surely, 2^654421641 is an apocalyptic number.

It is an amenable number.

654421641 is a deficient number, since it is larger than the sum of its proper divisors (221609991).

654421641 is an equidigital number, since it uses as much as digits as its factorization.

654421641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400 (or 3123 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 654421641 is about 25581.6661107130. Note that the first 3 decimals coincide. The cubic root of 654421641 is about 868.1988725265.

The spelling of 654421641 in words is "six hundred fifty-four million, four hundred twenty-one thousand, six hundred forty-one".