128105778176 has 22 divisors (see below), whose sum is σ = 256086455100. Its totient is φ = 64052888576.

The previous prime is 128105778161. The next prime is 128105778211. The reversal of 128105778176 is 671877501821.

It is a super-2 number, since 2×128105778176² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62550626 + ... + 62552673.

Almost surely, 2^128105778176 is an apocalyptic number.

128105778176 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128105778176 is a deficient number, since it is larger than the sum of its proper divisors (127980676924).

128105778176 is an equidigital number, since it uses as much as digits as its factorization.

128105778176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125103319 (or 125103301 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 53.

The spelling of 128105778176 in words is "one hundred twenty-eight billion, one hundred five million, seven hundred seventy-eight thousand, one hundred seventy-six".