128878377106 has 16 divisors (see below), whose sum is σ = 194193496224. Its totient is φ = 64147343904.

The previous prime is 128878377079. The next prime is 128878377109. The reversal of 128878377106 is 601773878821.

It is not an unprimeable number, because it can be changed into a prime (128878377109) 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, 2069581 + ... + 2130943.

It is an arithmetic number, because the mean of its divisors is an integer number (12137093514).

Almost surely, 2^128878377106 is an apocalyptic number.

128878377106 is a deficient number, since it is larger than the sum of its proper divisors (65315119118).

128878377106 is a wasteful number, since it uses less digits than its factorization.

128878377106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66105.

The product of its (nonzero) digits is 6322176, while the sum is 58.

The spelling of 128878377106 in words is "one hundred twenty-eight billion, eight hundred seventy-eight million, three hundred seventy-seven thousand, one hundred six".