64561653 has 12 divisors (see below), whose sum is σ = 100429420. Its totient is φ = 39730176.

The previous prime is 64561603. The next prime is 64561657. The reversal of 64561653 is 35616546.

64561653 is a `hidden beast` number, since 645 + 6 + 1 + 6 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 23882769 + 40678884 = 4887^2 + 6378^2 .

It is not a de Polignac number, because 64561653 - 2⁶ = 64561589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64561657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275788 + ... + 276021.

Almost surely, 2^64561653 is an apocalyptic number.

It is an amenable number.

64561653 is a deficient number, since it is larger than the sum of its proper divisors (35867767).

64561653 is a wasteful number, since it uses less digits than its factorization.

64561653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551828 (or 551825 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 64561653 is about 8035.0266334344. The cubic root of 64561653 is about 401.1667041119.

The spelling of 64561653 in words is "sixty-four million, five hundred sixty-one thousand, six hundred fifty-three".