128255155780 has 12 divisors (see below), whose sum is σ = 269335827180. Its totient is φ = 51302062304.

The previous prime is 128255155723. The next prime is 128255155781. The reversal of 128255155780 is 87551552821.

It can be written as a sum of positive squares in 2 ways, for example, as 98034114816 + 30221040964 = 313104^2 + 173842^2 .

It is not an unprimeable number, because it can be changed into a prime (128255155781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3206378875 + ... + 3206378914.

It is an arithmetic number, because the mean of its divisors is an integer number (22444652265).

Almost surely, 2^128255155780 is an apocalyptic number.

128255155780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128255155780 is an abundant number, since it is smaller than the sum of its proper divisors (141080671400).

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

128255155780 is a wasteful number, since it uses less digits than its factorization.

128255155780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6412757798 (or 6412757796 counting only the distinct ones).

The product of its (nonzero) digits is 1120000, while the sum is 49.

It can be divided in two parts, 1282551 and 55780, that added together give a palindrome (1338331).

The spelling of 128255155780 in words is "one hundred twenty-eight billion, two hundred fifty-five million, one hundred fifty-five thousand, seven hundred eighty".