128000026513 has 4 divisors (see below), whose sum is σ = 128715110640. Its totient is φ = 127284942388.

The previous prime is 128000026499. The next prime is 128000026541. The reversal of 128000026513 is 315620000821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315620000821 = 463 ⋅681684667.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128000026513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128000026543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357541795 + ... + 357542152.

It is an arithmetic number, because the mean of its divisors is an integer number (32178777660).

Almost surely, 2^128000026513 is an apocalyptic number.

It is an amenable number.

128000026513 is a deficient number, since it is larger than the sum of its proper divisors (715084127).

128000026513 is an equidigital number, since it uses as much as digits as its factorization.

128000026513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715084126.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 128000026513 in words is "one hundred twenty-eight billion, twenty-six thousand, five hundred thirteen".