64654245646 has 32 divisors (see below), whose sum is σ = 103311083520. Its totient is φ = 30259332000.

The previous prime is 64654245641. The next prime is 64654245673.

It is a happy number.

64654245646 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 64654245593 and 64654245602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64654245641) 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, 1851811 + ... + 1886401.

It is an arithmetic number, because the mean of its divisors is an integer number (3228471360).

Almost surely, 2^64654245646 is an apocalyptic number.

64654245646 is a deficient number, since it is larger than the sum of its proper divisors (38656837874).

64654245646 is a wasteful number, since it uses less digits than its factorization.

64654245646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35200.

The product of its digits is 16588800, while the sum is 52.

The spelling of 64654245646 in words is "sixty-four billion, six hundred fifty-four million, two hundred forty-five thousand, six hundred forty-six".