128540429138 has 32 divisors (see below), whose sum is σ = 228143780928. Its totient is φ = 53649318400.

The previous prime is 128540429033. The next prime is 128540429207. The reversal of 128540429138 is 831924045821.

It is a junction number, because it is equal to n+sod(n) for n = 128540429092 and 128540429101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4176020 + ... + 4206687.

It is an arithmetic number, because the mean of its divisors is an integer number (7129493154).

Almost surely, 2^128540429138 is an apocalyptic number.

128540429138 is a deficient number, since it is larger than the sum of its proper divisors (99603351790).

128540429138 is a wasteful number, since it uses less digits than its factorization.

128540429138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8382778.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 128540429138 in words is "one hundred twenty-eight billion, five hundred forty million, four hundred twenty-nine thousand, one hundred thirty-eight".