128855279588478 has 64 divisors (see below), whose sum is σ = 278330273133120. Its totient is φ = 39620973772800.

The previous prime is 128855279588443. The next prime is 128855279588501. The reversal of 128855279588478 is 874885972558821.

It is a super-3 number, since 3×128855279588478³ (a number of 43 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128855279588394 and 128855279588403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35101483 + ... + 38598246.

It is an arithmetic number, because the mean of its divisors is an integer number (4348910517705).

Almost surely, 2^{128855279588478} is an apocalyptic number.

128855279588478 is an abundant number, since it is smaller than the sum of its proper divisors (149474993544642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128855279588478 is a wasteful number, since it uses less digits than its factorization.

128855279588478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73700093.

The product of its digits is 28901376000, while the sum is 87.

The spelling of 128855279588478 in words is "one hundred twenty-eight trillion, eight hundred fifty-five billion, two hundred seventy-nine million, five hundred eighty-eight thousand, four hundred seventy-eight".