64646464646464 has 56 divisors (see below), whose sum is σ = 128847427344000. Its totient is φ = 32181029637120.

The previous prime is 64646464646459. The next prime is 64646464646497. The reversal of 64646464646464 is 46464646464646.

64646464646464 is an undulating number in base 10.

64646464646464 is a modest number, since divided by 64646464 gives 646464 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 64646464646393 and 64646464646402.

It is a congruent number.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70656559 + ... + 71565649.

Almost surely, 2^{64646464646464} is an apocalyptic number.

64646464646464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64646464646464 is a deficient number, since it is larger than the sum of its proper divisors (64200962697536).

64646464646464 is a wasteful number, since it uses less digits than its factorization.

64646464646464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913991 (or 913981 counting only the distinct ones).

The product of its digits is 4586471424, while the sum is 70.

The spelling of 64646464646464 in words is "sixty-four trillion, six hundred forty-six billion, four hundred sixty-four million, six hundred forty-six thousand, four hundred sixty-four".