128457626754821 has 8 divisors (see below), whose sum is σ = 158101694467584. Its totient is φ = 101636803586160.

The previous prime is 128457626754811. The next prime is 128457626754851.

128457626754821 is nontrivially palindromic in base 10.

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 128457626754821 - 2³⁸ = 128182748847877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128457626754811) 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, 705811135925 + ... + 705811136106.

It is an arithmetic number, because the mean of its divisors is an integer number (19762711808448).

Almost surely, 2^{128457626754821} is an apocalyptic number.

It is an amenable number.

128457626754821 is a deficient number, since it is larger than the sum of its proper divisors (29644067712763).

128457626754821 is a wasteful number, since it uses less digits than its factorization.

128457626754821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411622272051.

The product of its digits is 361267200, while the sum is 68.

The spelling of 128457626754821 in words is "one hundred twenty-eight trillion, four hundred fifty-seven billion, six hundred twenty-six million, seven hundred fifty-four thousand, eight hundred twenty-one".