128551144986378 has 16 divisors (see below), whose sum is σ = 285669211080960. Its totient is φ = 42850381662108.

The previous prime is 128551144986367. The next prime is 128551144986409. The reversal of 128551144986378 is 873689441155821.

128551144986378 is a `hidden beast` number, since 1 + 2 + 8 + 5 + 5 + 1 + 1 + 4 + 498 + 63 + 78 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1190288379450 + ... + 1190288379557.

It is an arithmetic number, because the mean of its divisors is an integer number (17854325692560).

Almost surely, 2^{128551144986378} is an apocalyptic number.

128551144986378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128551144986378 is an abundant number, since it is smaller than the sum of its proper divisors (157118066094582).

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

128551144986378 is a wasteful number, since it uses less digits than its factorization.

128551144986378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380576759018 (or 2380576759012 counting only the distinct ones).

The product of its digits is 464486400, while the sum is 72.

The spelling of 128551144986378 in words is "one hundred twenty-eight trillion, five hundred fifty-one billion, one hundred forty-four million, nine hundred eighty-six thousand, three hundred seventy-eight".