128533264664 has 128 divisors (see below), whose sum is σ = 290885713920. Its totient is φ = 52080537600.

The previous prime is 128533264637. The next prime is 128533264679. The reversal of 128533264664 is 466462335821.

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, 61764104 + ... + 61766184.

It is an arithmetic number, because the mean of its divisors is an integer number (2272544640).

Almost surely, 2^128533264664 is an apocalyptic number.

128533264664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128533264664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145442856960).

128533264664 is an abundant number, since it is smaller than the sum of its proper divisors (162352449256).

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

128533264664 is a wasteful number, since it uses less digits than its factorization.

128533264664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2929 (or 2925 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 50.

The spelling of 128533264664 in words is "one hundred twenty-eight billion, five hundred thirty-three million, two hundred sixty-four thousand, six hundred sixty-four".