67563649 has 8 divisors (see below), whose sum is σ = 69993000. Its totient is φ = 65140992.

The previous prime is 67563637. The next prime is 67563653. The reversal of 67563649 is 94636576.

It can be written as a sum of positive squares in 4 ways, for example, as 14899600 + 52664049 = 3860^2 + 7257^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67563649 - 2⁷ = 67563521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67563599 and 67563608.

It is not an unprimeable number, because it can be changed into a prime (67563679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28107 + ... + 30415.

It is an arithmetic number, because the mean of its divisors is an integer number (8749125).

Almost surely, 2^67563649 is an apocalyptic number.

It is an amenable number.

67563649 is a deficient number, since it is larger than the sum of its proper divisors (2429351).

67563649 is a wasteful number, since it uses less digits than its factorization.

67563649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347.

The product of its digits is 816480, while the sum is 46.

The square root of 67563649 is about 8219.7110046522. The cubic root of 67563649 is about 407.2905800381.

The spelling of 67563649 in words is "sixty-seven million, five hundred sixty-three thousand, six hundred forty-nine".