128520327264 has 48 divisors (see below), whose sum is σ = 385560983808. Its totient is φ = 36720093312.

The previous prime is 128520327263. The next prime is 128520327281. The reversal of 128520327264 is 462723025821.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128520327263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95624572 + ... + 95625915.

It is an arithmetic number, because the mean of its divisors is an integer number (8032520496).

Almost surely, 2^128520327264 is an apocalyptic number.

128520327264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

128520327264 is an abundant number, since it is smaller than the sum of its proper divisors (257040656544).

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

128520327264 is a wasteful number, since it uses less digits than its factorization.

128520327264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191250507 (or 191250499 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 128520327264 in words is "one hundred twenty-eight billion, five hundred twenty million, three hundred twenty-seven thousand, two hundred sixty-four".