128260538530 has 16 divisors (see below), whose sum is σ = 231203090304. Its totient is φ = 51229966320.

The previous prime is 128260538479. The next prime is 128260538531. The reversal of 128260538530 is 35835062821.

It is a super-2 number, since 2×128260538530² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128260538531) 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, 9273882 + ... + 9287701.

It is an arithmetic number, because the mean of its divisors is an integer number (14450193144).

Almost surely, 2^128260538530 is an apocalyptic number.

128260538530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128260538530 is a deficient number, since it is larger than the sum of its proper divisors (102942551774).

128260538530 is a wasteful number, since it uses less digits than its factorization.

128260538530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18562281.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 128260538530 in words is "one hundred twenty-eight billion, two hundred sixty million, five hundred thirty-eight thousand, five hundred thirty".