65649545 has 8 divisors (see below), whose sum is σ = 84839496. Its totient is φ = 48479616.

The previous prime is 65649539. The next prime is 65649593. The reversal of 65649545 is 54594656.

It can be written as a sum of positive squares in 4 ways, for example, as 104329 + 65545216 = 323^2 + 8096^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65649545 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65649496 and 65649505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504932 + ... + 505061.

It is an arithmetic number, because the mean of its divisors is an integer number (10604937).

Almost surely, 2^65649545 is an apocalyptic number.

65649545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65649545 is a deficient number, since it is larger than the sum of its proper divisors (19189951).

65649545 is a wasteful number, since it uses less digits than its factorization.

65649545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010011.

The product of its digits is 648000, while the sum is 44.

The square root of 65649545 is about 8102.4406816712. The cubic root of 65649545 is about 403.4074429917.

The spelling of 65649545 in words is "sixty-five million, six hundred forty-nine thousand, five hundred forty-five".