128496775541 has 4 divisors (see below), whose sum is σ = 128497512300. Its totient is φ = 128496038784.

The previous prime is 128496775529. The next prime is 128496775573. The reversal of 128496775541 is 145577694821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 78206919025 + 50289856516 = 279655^2 + 224254^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128496775541 is a prime.

It is a super-2 number, since 2×128496775541² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128496775441) 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 3 ways as a sum of consecutive naturals, for example, 56855 + ... + 510123.

It is an arithmetic number, because the mean of its divisors is an integer number (32124378075).

Almost surely, 2^128496775541 is an apocalyptic number.

It is an amenable number.

128496775541 is a deficient number, since it is larger than the sum of its proper divisors (736759).

128496775541 is an equidigital number, since it uses as much as digits as its factorization.

128496775541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736758.

The product of its digits is 16934400, while the sum is 59.

The spelling of 128496775541 in words is "one hundred twenty-eight billion, four hundred ninety-six million, seven hundred seventy-five thousand, five hundred forty-one".