128278222054 has 8 divisors (see below), whose sum is σ = 192646676880. Its totient is φ = 64062663096.

The previous prime is 128278221979. The next prime is 128278222091. The reversal of 128278222054 is 450222872821.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 128278222054.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38221869 + ... + 38225224.

It is an arithmetic number, because the mean of its divisors is an integer number (24080834610).

Almost surely, 2^128278222054 is an apocalyptic number.

128278222054 is a deficient number, since it is larger than the sum of its proper divisors (64368454826).

128278222054 is an equidigital number, since it uses as much as digits as its factorization.

128278222054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76447934.

The product of its (nonzero) digits is 286720, while the sum is 43.

The spelling of 128278222054 in words is "one hundred twenty-eight billion, two hundred seventy-eight million, two hundred twenty-two thousand, fifty-four".