128304643461 has 8 divisors (see below), whose sum is σ = 171150170400. Its totient is φ = 85497772752.

The previous prime is 128304643459. The next prime is 128304643483. The reversal of 128304643461 is 164346403821.

It is a happy number.

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

It is not a de Polignac number, because 128304643461 - 2¹ = 128304643459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128304641461) 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, 9656311 + ... + 9669588.

It is an arithmetic number, because the mean of its divisors is an integer number (21393771300).

Almost surely, 2^128304643461 is an apocalyptic number.

It is an amenable number.

128304643461 is a deficient number, since it is larger than the sum of its proper divisors (42845526939).

128304643461 is a wasteful number, since it uses less digits than its factorization.

128304643461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19328115.

The product of its (nonzero) digits is 331776, while the sum is 42.

The spelling of 128304643461 in words is "one hundred twenty-eight billion, three hundred four million, six hundred forty-three thousand, four hundred sixty-one".