128284874105 has 8 divisors (see below), whose sum is σ = 162997251912. Its totient is φ = 96590963968.

The previous prime is 128284874087. The next prime is 128284874143. The reversal of 128284874105 is 501478482821.

It can be written as a sum of positive squares in 4 ways, for example, as 44739018256 + 83545855849 = 211516^2 + 289043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128284874105 - 2²² = 128280679801 is a prime.

It is a super-3 number, since 3×128284874105³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 754616822 + ... + 754616991.

It is an arithmetic number, because the mean of its divisors is an integer number (20374656489).

Almost surely, 2^128284874105 is an apocalyptic number.

It is an amenable number.

128284874105 is a deficient number, since it is larger than the sum of its proper divisors (34712377807).

128284874105 is a wasteful number, since it uses less digits than its factorization.

128284874105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509233835.

The product of its (nonzero) digits is 1146880, while the sum is 50.

The spelling of 128284874105 in words is "one hundred twenty-eight billion, two hundred eighty-four million, eight hundred seventy-four thousand, one hundred five".