64683788738646 has 64 divisors (see below), whose sum is σ = 161317538390016. Its totient is φ = 16798057927200.

The previous prime is 64683788738641. The next prime is 64683788738651.

64683788738646 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (64683788738641) and next prime (64683788738651).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64683788738641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9536200 + ... + 14842731.

It is an arithmetic number, because the mean of its divisors is an integer number (2520586537344).

Almost surely, 2^{64683788738646} is an apocalyptic number.

64683788738646 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

64683788738646 is an abundant number, since it is smaller than the sum of its proper divisors (96633749651370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64683788738646 is a wasteful number, since it uses less digits than its factorization.

64683788738646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24384697.

The product of its digits is 37456183296, while the sum is 84.

The spelling of 64683788738646 in words is "sixty-four trillion, six hundred eighty-three billion, seven hundred eighty-eight million, seven hundred thirty-eight thousand, six hundred forty-six".