128149647999 has 8 divisors (see below), whose sum is σ = 170874020352. Its totient is φ = 85429187160.

The previous prime is 128149647859. The next prime is 128149648001. The reversal of 128149647999 is 999746941821.

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

It is not a de Polignac number, because 128149647999 - 2⁹ = 128149647487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128149640999) 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, 900559 + ... + 1033104.

It is an arithmetic number, because the mean of its divisors is an integer number (21359252544).

Almost surely, 2^128149647999 is an apocalyptic number.

128149647999 is a deficient number, since it is larger than the sum of its proper divisors (42724372353).

128149647999 is a wasteful number, since it uses less digits than its factorization.

128149647999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955757.

The product of its digits is 70543872, while the sum is 69.

The spelling of 128149647999 in words is "one hundred twenty-eight billion, one hundred forty-nine million, six hundred forty-seven thousand, nine hundred ninety-nine".