64523878733684 has 48 divisors (see below), whose sum is σ = 122354301396096. Its totient is φ = 29654420275200.

The previous prime is 64523878733683. The next prime is 64523878733687. The reversal of 64523878733684 is 48633787832546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64523878733683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22726964 + ... + 25407924.

It is an arithmetic number, because the mean of its divisors is an integer number (2549047945752).

Almost surely, 2^{64523878733684} is an apocalyptic number.

It is an amenable number.

64523878733684 is a deficient number, since it is larger than the sum of its proper divisors (57830422662412).

64523878733684 is a wasteful number, since it uses less digits than its factorization.

64523878733684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689256 (or 2689254 counting only the distinct ones).

The product of its digits is 3901685760, while the sum is 74.

The spelling of 64523878733684 in words is "sixty-four trillion, five hundred twenty-three billion, eight hundred seventy-eight million, seven hundred thirty-three thousand, six hundred eighty-four".