128649126428 has 12 divisors (see below), whose sum is σ = 225203826960. Its totient is φ = 64305175872.

The previous prime is 128649126413. The next prime is 128649126433. The reversal of 128649126428 is 824621946821.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 128649126428.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4831901 + ... + 4858452.

It is an arithmetic number, because the mean of its divisors is an integer number (18766985580).

Almost surely, 2^128649126428 is an apocalyptic number.

It is an amenable number.

128649126428 is a deficient number, since it is larger than the sum of its proper divisors (96554700532).

128649126428 is a wasteful number, since it uses less digits than its factorization.

128649126428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9693676 (or 9693674 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 53.

The spelling of 128649126428 in words is "one hundred twenty-eight billion, six hundred forty-nine million, one hundred twenty-six thousand, four hundred twenty-eight".