128744612909923 has 8 divisors (see below), whose sum is σ = 140193770864400. Its totient is φ = 117762767525088.

The previous prime is 128744612909917. The next prime is 128744612909951. The reversal of 128744612909923 is 329909216447821.

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

It is not a de Polignac number, because 128744612909923 - 2²¹ = 128744610812771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128744612909023) 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, 116828141836 + ... + 116828142937.

It is an arithmetic number, because the mean of its divisors is an integer number (17524221358050).

Almost surely, 2^{128744612909923} is an apocalyptic number.

128744612909923 is a deficient number, since it is larger than the sum of its proper divisors (11449157954477).

128744612909923 is a wasteful number, since it uses less digits than its factorization.

128744612909923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233656284821.

The product of its (nonzero) digits is 94058496, while the sum is 67.

The spelling of 128744612909923 in words is "one hundred twenty-eight trillion, seven hundred forty-four billion, six hundred twelve million, nine hundred nine thousand, nine hundred twenty-three".