128258423515 has 16 divisors (see below), whose sum is σ = 159471957600. Its totient is φ = 98964466432.

The previous prime is 128258423507. The next prime is 128258423537. The reversal of 128258423515 is 515324852821.

It is a cyclic number.

It is not a de Polignac number, because 128258423515 - 2³ = 128258423507 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4086010 + ... + 4117279.

It is an arithmetic number, because the mean of its divisors is an integer number (9966997350).

Almost surely, 2^128258423515 is an apocalyptic number.

128258423515 is a deficient number, since it is larger than the sum of its proper divisors (31213534085).

128258423515 is an equidigital number, since it uses as much as digits as its factorization.

128258423515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8203406.

The product of its digits is 768000, while the sum is 46.

The spelling of 128258423515 in words is "one hundred twenty-eight billion, two hundred fifty-eight million, four hundred twenty-three thousand, five hundred fifteen".