128770878860 has 48 divisors (see below), whose sum is σ = 308350911456. Its totient is φ = 44749335552.

The previous prime is 128770878839. The next prime is 128770878913. The reversal of 128770878860 is 68878077821.

It is a junction number, because it is equal to n+sod(n) for n = 128770878793 and 128770878802.

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, 14562422 + ... + 14571261.

It is an arithmetic number, because the mean of its divisors is an integer number (6423977322).

Almost surely, 2^128770878860 is an apocalyptic number.

128770878860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128770878860 is an abundant number, since it is smaller than the sum of its proper divisors (179580032596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128770878860 is a wasteful number, since it uses less digits than its factorization.

128770878860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29133722 (or 29133720 counting only the distinct ones).

The product of its (nonzero) digits is 16859136, while the sum is 62.

The spelling of 128770878860 in words is "one hundred twenty-eight billion, seven hundred seventy million, eight hundred seventy-eight thousand, eight hundred sixty".