128507408377 has 8 divisors (see below), whose sum is σ = 128584040000. Its totient is φ = 128430807120.

The previous prime is 128507408357. The next prime is 128507408453. The reversal of 128507408377 is 773804705821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128507408377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128507408327) 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, 23097598 + ... + 23103160.

It is an arithmetic number, because the mean of its divisors is an integer number (16073005000).

Almost surely, 2^128507408377 is an apocalyptic number.

It is an amenable number.

128507408377 is a deficient number, since it is larger than the sum of its proper divisors (76631623).

128507408377 is an equidigital number, since it uses as much as digits as its factorization.

128507408377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15183.

The product of its (nonzero) digits is 2634240, while the sum is 52.

The spelling of 128507408377 in words is "one hundred twenty-eight billion, five hundred seven million, four hundred eight thousand, three hundred seventy-seven".