65473039128 has 128 divisors (see below), whose sum is σ = 191404224000. Its totient is φ = 18655555968.

The previous prime is 65473039111. The next prime is 65473039141. The reversal of 65473039128 is 82193037456.

It is a Cunningham number, because it is equal to 255877²-1.

It is a congruent number.

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, 3059875 + ... + 3081197.

It is an arithmetic number, because the mean of its divisors is an integer number (1495345500).

It is a 2-persistent number, because it is pandigital, and so is 2⋅65473039128 = 130946078256, but 3⋅65473039128 = 196419117384 is not.

Almost surely, 2^65473039128 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 65473039128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95702112000).

65473039128 is an abundant number, since it is smaller than the sum of its proper divisors (125931184872).

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

65473039128 is a wasteful number, since it uses less digits than its factorization.

65473039128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21726 (or 21708 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 65473039128 in words is "sixty-five billion, four hundred seventy-three million, thirty-nine thousand, one hundred twenty-eight".