128515240559139 has 12 divisors (see below), whose sum is σ = 199329760867464. Its totient is φ = 73437280319424.

The previous prime is 128515240559117. The next prime is 128515240559159. The reversal of 128515240559139 is 931955042515821.

It is a happy number.

It is not a de Polignac number, because 128515240559139 - 2⁵ = 128515240559107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128515240559159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 437126668422 + ... + 437126668715.

It is an arithmetic number, because the mean of its divisors is an integer number (16610813405622).

Almost surely, 2^{128515240559139} is an apocalyptic number.

128515240559139 is a deficient number, since it is larger than the sum of its proper divisors (70814520308325).

128515240559139 is an equidigital number, since it uses as much as digits as its factorization.

128515240559139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874253337154 (or 874253337147 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 60.

The spelling of 128515240559139 in words is "one hundred twenty-eight trillion, five hundred fifteen billion, two hundred forty million, five hundred fifty-nine thousand, one hundred thirty-nine".