128704518436461 has 16 divisors (see below), whose sum is σ = 187349806130688. Its totient is φ = 77943057671600.

The previous prime is 128704518436453. The next prime is 128704518436477. The reversal of 128704518436461 is 164634815407821.

It is a happy number.

It is not a de Polignac number, because 128704518436461 - 2³ = 128704518436453 is a prime.

It is a super-2 number, since 2×128704518436461² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128704518436395 and 128704518436404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128704518436561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1491975585 + ... + 1492061846.

It is an arithmetic number, because the mean of its divisors is an integer number (11709362883168).

Almost surely, 2^{128704518436461} is an apocalyptic number.

128704518436461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

128704518436461 is a deficient number, since it is larger than the sum of its proper divisors (58645287694227).

128704518436461 is a wasteful number, since it uses less digits than its factorization.

128704518436461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2984038752.

The product of its (nonzero) digits is 30965760, while the sum is 60.

The spelling of 128704518436461 in words is "one hundred twenty-eight trillion, seven hundred four billion, five hundred eighteen million, four hundred thirty-six thousand, four hundred sixty-one".