64654645646 has 8 divisors (see below), whose sum is σ = 97745606400. Its totient is φ = 32072776848.

The previous prime is 64654645607. The next prime is 64654645703.

64654645646 is nontrivially palindromic in base 10.

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

It is a junction number, because it is equal to n+sod(n) for n = 64654645591 and 64654645600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127272671 + ... + 127273178.

It is an arithmetic number, because the mean of its divisors is an integer number (12218200800).

Almost surely, 2^64654645646 is an apocalyptic number.

64654645646 is a deficient number, since it is larger than the sum of its proper divisors (33090960754).

64654645646 is a wasteful number, since it uses less digits than its factorization.

64654645646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254545978.

The product of its digits is 49766400, while the sum is 56.

The spelling of 64654645646 in words is "sixty-four billion, six hundred fifty-four million, six hundred forty-five thousand, six hundred forty-six".