64642224646 has 8 divisors (see below), whose sum is σ = 96986116440. Its totient is φ = 32313519168.

The previous prime is 64642224637. The next prime is 64642224677.

64642224646 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 = 64642224596 and 64642224605.

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, 3785931 + ... + 3802966.

It is an arithmetic number, because the mean of its divisors is an integer number (12123264555).

Almost surely, 2^64642224646 is an apocalyptic number.

64642224646 is a deficient number, since it is larger than the sum of its proper divisors (32343891794).

64642224646 is a wasteful number, since it uses less digits than its factorization.

64642224646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7593158.

The product of its digits is 2654208, while the sum is 46.

The spelling of 64642224646 in words is "sixty-four billion, six hundred forty-two million, two hundred twenty-four thousand, six hundred forty-six".