128242155838 has 16 divisors (see below), whose sum is σ = 201835853856. Its totient is φ = 60994343520.

The previous prime is 128242155827. The next prime is 128242155841. The reversal of 128242155838 is 838551242821.

It is a junction number, because it is equal to n+sod(n) for n = 128242155791 and 128242155800.

It is a congruent 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, 7692981 + ... + 7709632.

It is an arithmetic number, because the mean of its divisors is an integer number (12614740866).

Almost surely, 2^128242155838 is an apocalyptic number.

128242155838 is a deficient number, since it is larger than the sum of its proper divisors (73593698018).

128242155838 is a wasteful number, since it uses less digits than its factorization.

128242155838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15402819.

The product of its digits is 1228800, while the sum is 49.

The spelling of 128242155838 in words is "one hundred twenty-eight billion, two hundred forty-two million, one hundred fifty-five thousand, eight hundred thirty-eight".