64676388367646 has 32 divisors (see below), whose sum is σ = 106276731406560. Its totient is φ = 29275651584000.

The previous prime is 64676388367621. The next prime is 64676388367739.

64676388367646 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 15 ways as a sum of consecutive naturals, for example, 1036805 + ... + 11420496.

It is an arithmetic number, because the mean of its divisors is an integer number (3321147856455).

Almost surely, 2^{64676388367646} is an apocalyptic number.

64676388367646 is a deficient number, since it is larger than the sum of its proper divisors (41600343038914).

64676388367646 is a wasteful number, since it uses less digits than its factorization.

64676388367646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12458300.

The product of its digits is 21069103104, while the sum is 80.

The spelling of 64676388367646 in words is "sixty-four trillion, six hundred seventy-six billion, three hundred eighty-eight million, three hundred sixty-seven thousand, six hundred forty-six".