64651731603844 has 108 divisors (see below), whose sum is σ = 143679238138800. Its totient is φ = 25171101312000.

The previous prime is 64651731603839. The next prime is 64651731603871. The reversal of 64651731603844 is 44830613715646.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5526255507 + ... + 5526267205.

It is an arithmetic number, because the mean of its divisors is an integer number (1330363316100).

Almost surely, 2^{64651731603844} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64651731603844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71839619069400).

64651731603844 is an abundant number, since it is smaller than the sum of its proper divisors (79027506534956).

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

64651731603844 is a wasteful number, since it uses less digits than its factorization.

64651731603844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14930 (or 13320 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 58.

The spelling of 64651731603844 in words is "sixty-four trillion, six hundred fifty-one billion, seven hundred thirty-one million, six hundred three thousand, eight hundred forty-four".