128256145554 has 32 divisors (see below), whose sum is σ = 256803208704. Its totient is φ = 42703597440.

The previous prime is 128256145553. The next prime is 128256145579. The reversal of 128256145554 is 455541652821.

It is not an unprimeable number, because it can be changed into a prime (128256145553) 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, 29326912 + ... + 29331284.

It is an arithmetic number, because the mean of its divisors is an integer number (8025100272).

Almost surely, 2^128256145554 is an apocalyptic number.

128256145554 is an abundant number, since it is smaller than the sum of its proper divisors (128547063150).

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

128256145554 is a wasteful number, since it uses less digits than its factorization.

128256145554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8802.

The product of its digits is 1920000, while the sum is 48.

The spelling of 128256145554 in words is "one hundred twenty-eight billion, two hundred fifty-six million, one hundred forty-five thousand, five hundred fifty-four".