128640914077 has 8 divisors (see below), whose sum is σ = 138814004000. Its totient is φ = 118507486320.

The previous prime is 128640914069. The next prime is 128640914089. The reversal of 128640914077 is 770419046821.

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 128640914077 - 2³ = 128640914069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128640914077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128640914177) 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, 9908799 + ... + 9921772.

It is an arithmetic number, because the mean of its divisors is an integer number (17351750500).

Almost surely, 2^128640914077 is an apocalyptic number.

It is an amenable number.

128640914077 is a deficient number, since it is larger than the sum of its proper divisors (10173089923).

128640914077 is a wasteful number, since it uses less digits than its factorization.

128640914077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19831083.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 128640914077 in words is "one hundred twenty-eight billion, six hundred forty million, nine hundred fourteen thousand, seventy-seven".