128742717378 has 16 divisors (see below), whose sum is σ = 280893201696. Its totient is φ = 39012944640.

The previous prime is 128742717349. The next prime is 128742717403. The reversal of 128742717378 is 873717247821.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 975323551 + ... + 975323682.

It is an arithmetic number, because the mean of its divisors is an integer number (17555825106).

Almost surely, 2^128742717378 is an apocalyptic number.

128742717378 is an abundant number, since it is smaller than the sum of its proper divisors (152150484318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128742717378 is a wasteful number, since it uses less digits than its factorization.

128742717378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950647249.

The product of its digits is 7375872, while the sum is 57.

The spelling of 128742717378 in words is "one hundred twenty-eight billion, seven hundred forty-two million, seven hundred seventeen thousand, three hundred seventy-eight".