128145577 has 8 divisors (see below), whose sum is σ = 151502400. Its totient is φ = 106051344.

The previous prime is 128145539. The next prime is 128145617. The reversal of 128145577 is 775541821.

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

It is not a de Polignac number, because 128145577 - 2⁷ = 128145449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128145517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315427 + ... + 315832.

It is an arithmetic number, because the mean of its divisors is an integer number (18937800).

Almost surely, 2^128145577 is an apocalyptic number.

It is an amenable number.

128145577 is a deficient number, since it is larger than the sum of its proper divisors (23356823).

128145577 is an equidigital number, since it uses as much as digits as its factorization.

128145577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631295.

The product of its digits is 78400, while the sum is 40.

The square root of 128145577 is about 11320.1403259854. The cubic root of 128145577 is about 504.1594054127.

The spelling of 128145577 in words is "one hundred twenty-eight million, one hundred forty-five thousand, five hundred seventy-seven".