128916325449 has 6 divisors (see below), whose sum is σ = 186212470106. Its totient is φ = 85944216960.

The previous prime is 128916325409. The next prime is 128916325501. The reversal of 128916325449 is 944523619821.

It is a happy number.

128916325449 is a `hidden beast` number, since 1 + 2 + 8 + 91 + 6 + 3 + 2 + 544 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 98894525625 + 30021799824 = 314475^2 + 173268^2 .

It is not a de Polignac number, because 128916325449 - 2¹¹ = 128916323401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128916325395 and 128916325404.

It is not an unprimeable number, because it can be changed into a prime (128916325409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7162018072 + ... + 7162018089.

Almost surely, 2^128916325449 is an apocalyptic number.

It is an amenable number.

128916325449 is a deficient number, since it is larger than the sum of its proper divisors (57296144657).

128916325449 is a wasteful number, since it uses less digits than its factorization.

128916325449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14324036167 (or 14324036164 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The spelling of 128916325449 in words is "one hundred twenty-eight billion, nine hundred sixteen million, three hundred twenty-five thousand, four hundred forty-nine".