128864194761 has 8 divisors (see below), whose sum is σ = 173487071680. Its totient is φ = 85075390512.

The previous prime is 128864194757. The next prime is 128864194769. The reversal of 128864194761 is 167491468821.

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

It is not a de Polignac number, because 128864194761 - 2² = 128864194757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128864194769) 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, 208517806 + ... + 208518423.

It is an arithmetic number, because the mean of its divisors is an integer number (21685883960).

Almost surely, 2^128864194761 is an apocalyptic number.

It is an amenable number.

128864194761 is a deficient number, since it is larger than the sum of its proper divisors (44622876919).

128864194761 is a wasteful number, since it uses less digits than its factorization.

128864194761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417036335.

The product of its digits is 4644864, while the sum is 57.

The spelling of 128864194761 in words is "one hundred twenty-eight billion, eight hundred sixty-four million, one hundred ninety-four thousand, seven hundred sixty-one".