128619955 has 8 divisors (see below), whose sum is σ = 158515632. Its totient is φ = 100114848.

The previous prime is 128619947. The next prime is 128619989. The reversal of 128619955 is 559916821.

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 128619955 - 2³ = 128619947 is a prime.

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, 347437 + ... + 347806.

It is an arithmetic number, because the mean of its divisors is an integer number (19814454).

Almost surely, 2^128619955 is an apocalyptic number.

128619955 is a deficient number, since it is larger than the sum of its proper divisors (29895677).

128619955 is an equidigital number, since it uses as much as digits as its factorization.

128619955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695285.

The product of its digits is 194400, while the sum is 46.

The square root of 128619955 is about 11341.0738027755. The cubic root of 128619955 is about 504.7807498396.

The spelling of 128619955 in words is "one hundred twenty-eight million, six hundred nineteen thousand, nine hundred fifty-five".