128120686695730 has 16 divisors (see below), whose sum is σ = 230619663500544. Its totient is φ = 51247735245360.

The previous prime is 128120686695719. The next prime is 128120686695733. The reversal of 128120686695730 is 37596686021821.

It is not an unprimeable number, because it can be changed into a prime (128120686695733) 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, 66430872 + ... + 68332291.

It is an arithmetic number, because the mean of its divisors is an integer number (14413728968784).

Almost surely, 2^{128120686695730} is an apocalyptic number.

128120686695730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128120686695730 is a deficient number, since it is larger than the sum of its proper divisors (102498976804814).

128120686695730 is a wasteful number, since it uses less digits than its factorization.

128120686695730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134858241.

The product of its (nonzero) digits is 52254720, while the sum is 64.

The spelling of 128120686695730 in words is "one hundred twenty-eight trillion, one hundred twenty billion, six hundred eighty-six million, six hundred ninety-five thousand, seven hundred thirty".