128126523579 has 8 divisors (see below), whose sum is σ = 179826699840. Its totient is φ = 80922014856.

The previous prime is 128126523529. The next prime is 128126523583. The reversal of 128126523579 is 975325621821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128126523579 - 2¹⁶ = 128126458043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128126523529) 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, 1123916817 + ... + 1123916930.

It is an arithmetic number, because the mean of its divisors is an integer number (22478337480).

Almost surely, 2^128126523579 is an apocalyptic number.

128126523579 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

128126523579 is a deficient number, since it is larger than the sum of its proper divisors (51700176261).

128126523579 is a wasteful number, since it uses less digits than its factorization.

128126523579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2247833769.

The product of its digits is 1814400, while the sum is 51.

The spelling of 128126523579 in words is "one hundred twenty-eight billion, one hundred twenty-six million, five hundred twenty-three thousand, five hundred seventy-nine".