128306856155 has 8 divisors (see below), whose sum is σ = 153970159392. Its totient is φ = 102644196928.

The previous prime is 128306856137. The next prime is 128306856163. The reversal of 128306856155 is 551658603821.

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 128306856155 - 2³⁶ = 59587379419 is a prime.

It is a super-2 number, since 2×128306856155² (a number of 23 digits) contains 22 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, 635879 + ... + 812991.

It is an arithmetic number, because the mean of its divisors is an integer number (19246269924).

Almost surely, 2^128306856155 is an apocalyptic number.

128306856155 is a deficient number, since it is larger than the sum of its proper divisors (25663303237).

128306856155 is a wasteful number, since it uses less digits than its factorization.

128306856155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322005.

The product of its (nonzero) digits is 1728000, while the sum is 50.

The spelling of 128306856155 in words is "one hundred twenty-eight billion, three hundred six million, eight hundred fifty-six thousand, one hundred fifty-five".