65864250763944 has 128 divisors (see below), whose sum is σ = 173249995564800. Its totient is φ = 20838634076160.

The previous prime is 65864250763879. The next prime is 65864250763963. The reversal of 65864250763944 is 44936705246856.

It is a super-2 number, since 2×65864250763944² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479024134 + ... + 479161610.

It is an arithmetic number, because the mean of its divisors is an integer number (1353515590350).

Almost surely, 2^{65864250763944} 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 65864250763944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86624997782400).

65864250763944 is an abundant number, since it is smaller than the sum of its proper divisors (107385744800856).

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

65864250763944 is a wasteful number, since it uses less digits than its factorization.

65864250763944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150723 (or 150719 counting only the distinct ones).

The product of its (nonzero) digits is 1045094400, while the sum is 69.

The spelling of 65864250763944 in words is "sixty-five trillion, eight hundred sixty-four billion, two hundred fifty million, seven hundred sixty-three thousand, nine hundred forty-four".