128540229452 has 12 divisors (see below), whose sum is σ = 224956122720. Its totient is φ = 64267051536.

The previous prime is 128540229451. The next prime is 128540229469. The reversal of 128540229452 is 254922045821.

It is not an unprimeable number, because it can be changed into a prime (128540229451) 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, 670052 + ... + 840267.

It is an arithmetic number, because the mean of its divisors is an integer number (18746343560).

Almost surely, 2^128540229452 is an apocalyptic number.

It is an amenable number.

128540229452 is a deficient number, since it is larger than the sum of its proper divisors (96415893268).

128540229452 is a wasteful number, since it uses less digits than its factorization.

128540229452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531600 (or 1531598 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 128540229452 in words is "one hundred twenty-eight billion, five hundred forty million, two hundred twenty-nine thousand, four hundred fifty-two".