128278230508617 has 16 divisors (see below), whose sum is σ = 205759567733760. Its totient is φ = 69443854109712.

The previous prime is 128278230508601. The next prime is 128278230508619. The reversal of 128278230508617 is 716805032872821.

It is not a de Polignac number, because 128278230508617 - 2⁴ = 128278230508601 is a prime.

It is a super-3 number, since 3×128278230508617³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (128278230508619) 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, 160749661893 + ... + 160749662690.

It is an arithmetic number, because the mean of its divisors is an integer number (12859972983360).

Almost surely, 2^{128278230508617} is an apocalyptic number.

It is an amenable number.

128278230508617 is a deficient number, since it is larger than the sum of its proper divisors (77481337225143).

128278230508617 is a wasteful number, since it uses less digits than its factorization.

128278230508617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321499324612.

The product of its (nonzero) digits is 18063360, while the sum is 60.

The spelling of 128278230508617 in words is "one hundred twenty-eight trillion, two hundred seventy-eight billion, two hundred thirty million, five hundred eight thousand, six hundred seventeen".