64642488424646 has 24 divisors (see below), whose sum is σ = 106861184378760. Its totient is φ = 29305421671680.

The previous prime is 64642488424621. The next prime is 64642488424693.

It is a happy number.

64642488424646 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 352306331 + ... + 352489766.

It is an arithmetic number, because the mean of its divisors is an integer number (4452549349115).

Almost surely, 2^{64642488424646} is an apocalyptic number.

64642488424646 is a deficient number, since it is larger than the sum of its proper divisors (42218695954114).

64642488424646 is a wasteful number, since it uses less digits than its factorization.

64642488424646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704796500 (or 704796489 counting only the distinct ones).

The product of its digits is 1358954496, while the sum is 68.

The spelling of 64642488424646 in words is "sixty-four trillion, six hundred forty-two billion, four hundred eighty-eight million, four hundred twenty-four thousand, six hundred forty-six".