128575237911552 has 220 divisors, whose sum is σ = 383974445473696. Its totient is φ = 42855772999680.

The previous prime is 128575237911401. The next prime is 128575237911559. The reversal of 128575237911552 is 255119732575821.

It is a happy number.

128575237911552 is a `hidden beast` number, since 1 + 2 + 8 + 5 + 7 + 5 + 2 + 3 + 79 + 1 + 1 + 552 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 128575237911552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128575237911559) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1720470027 + ... + 1720544757.

Almost surely, 2^{128575237911552} is an apocalyptic number.

128575237911552 is a gapful number since it is divisible by the number (12) 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 128575237911552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191987222736848).

128575237911552 is an abundant number, since it is smaller than the sum of its proper divisors (255399207562144).

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

128575237911552 is an equidigital number, since it uses as much as digits as its factorization.

128575237911552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95506 (or 95479 counting only the distinct ones).

The product of its digits is 52920000, while the sum is 63.

The spelling of 128575237911552 in words is "one hundred twenty-eight trillion, five hundred seventy-five billion, two hundred thirty-seven million, nine hundred eleven thousand, five hundred fifty-two".