128051643 has 8 divisors (see below), whose sum is σ = 171882000. Its totient is φ = 84794528.

The previous prime is 128051629. The next prime is 128051663. The reversal of 128051643 is 346150821.

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 128051643 - 2⁶ = 128051579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128051643.

It is not an unprimeable number, because it can be changed into a prime (128051663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142788 + ... + 143681.

It is an arithmetic number, because the mean of its divisors is an integer number (21485250).

Almost surely, 2^128051643 is an apocalyptic number.

128051643 is a deficient number, since it is larger than the sum of its proper divisors (43830357).

128051643 is a wasteful number, since it uses less digits than its factorization.

128051643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286621.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 128051643 is about 11315.9905885433. The cubic root of 128051643 is about 504.0361880352.

The spelling of 128051643 in words is "one hundred twenty-eight million, fifty-one thousand, six hundred forty-three".