128262607758 has 16 divisors (see below), whose sum is σ = 285028017360. Its totient is φ = 42754202568.

The previous prime is 128262607757. The next prime is 128262607789. The reversal of 128262607758 is 857706262821.

128262607758 is a `hidden beast` number, since 1 + 2 + 8 + 2 + 626 + 0 + 7 + 7 + 5 + 8 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 2375233477 = 128262607758 / (1 + 2 + 8 + 2 + 6 + 2 + 6 + 0 + 7 + 7 + 5 + 8).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128262607751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1187616685 + ... + 1187616792.

It is an arithmetic number, because the mean of its divisors is an integer number (17814251085).

Almost surely, 2^128262607758 is an apocalyptic number.

128262607758 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128262607758 is an abundant number, since it is smaller than the sum of its proper divisors (156765409602).

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

128262607758 is a wasteful number, since it uses less digits than its factorization.

128262607758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375233488 (or 2375233482 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 128262607758 in words is "one hundred twenty-eight billion, two hundred sixty-two million, six hundred seven thousand, seven hundred fifty-eight".