128056440767 has 8 divisors (see below), whose sum is σ = 128883511680. Its totient is φ = 127231627680.

The previous prime is 128056440739. The next prime is 128056440829. The reversal of 128056440767 is 767044650821.

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 128056440767 - 2¹⁰ = 128056439743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128056440167) 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, 450584 + ... + 677597.

It is an arithmetic number, because the mean of its divisors is an integer number (16110438960).

Almost surely, 2^128056440767 is an apocalyptic number.

128056440767 is a deficient number, since it is larger than the sum of its proper divisors (827070913).

128056440767 is a wasteful number, since it uses less digits than its factorization.

128056440767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128913.

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 128056440767 in words is "one hundred twenty-eight billion, fifty-six million, four hundred forty thousand, seven hundred sixty-seven".