649454565 has 64 divisors (see below), whose sum is σ = 1132185600. Its totient is φ = 316909824.

The previous prime is 649454563. The next prime is 649454573. The reversal of 649454565 is 565454946.

It is not a de Polignac number, because 649454565 - 2¹ = 649454563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649454563) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1390462 + ... + 1390928.

It is an arithmetic number, because the mean of its divisors is an integer number (17690400).

Almost surely, 2^649454565 is an apocalyptic number.

It is an amenable number.

649454565 is a deficient number, since it is larger than the sum of its proper divisors (482731035).

649454565 is a wasteful number, since it uses less digits than its factorization.

649454565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666.

The product of its digits is 2592000, while the sum is 48.

The square root of 649454565 is about 25484.3984625888. The cubic root of 649454565 is about 865.9967415744.

The spelling of 649454565 in words is "six hundred forty-nine million, four hundred fifty-four thousand, five hundred sixty-five".