64646602064026 has 4 divisors (see below), whose sum is σ = 96969903096042. Its totient is φ = 32323301032012.

The previous prime is 64646602063963. The next prime is 64646602064053. The reversal of 64646602064026 is 62046020664646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46732249537801 + 17914352526225 = 6836099^2 + 4232535^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16161650516005 + ... + 16161650516008.

Almost surely, 2^{64646602064026} is an apocalyptic number.

64646602064026 is a deficient number, since it is larger than the sum of its proper divisors (32323301032016).

64646602064026 is a wasteful number, since it uses less digits than its factorization.

64646602064026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32323301032015.

The product of its (nonzero) digits is 11943936, while the sum is 52.

The spelling of 64646602064026 in words is "sixty-four trillion, six hundred forty-six billion, six hundred two million, sixty-four thousand, twenty-six".