654621649 has 16 divisors (see below), whose sum is σ = 772044480. Its totient is φ = 548544960.

The previous prime is 654621647. The next prime is 654621689. The reversal of 654621649 is 946126456.

654621649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 654621649 - 2¹ = 654621647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (654621641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34594 + ... + 50059.

It is an arithmetic number, because the mean of its divisors is an integer number (48252780).

Almost surely, 2^654621649 is an apocalyptic number.

It is an amenable number.

654621649 is a deficient number, since it is larger than the sum of its proper divisors (117422831).

654621649 is a wasteful number, since it uses less digits than its factorization.

654621649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84720.

The product of its digits is 311040, while the sum is 43.

The square root of 654621649 is about 25585.5750179667. The cubic root of 654621649 is about 868.2873114482.

The spelling of 654621649 in words is "six hundred fifty-four million, six hundred twenty-one thousand, six hundred forty-nine".