128345350986 has 40 divisors (see below), whose sum is σ = 289195362720. Its totient is φ = 42542769672.

The previous prime is 128345350979. The next prime is 128345351077. The reversal of 128345350986 is 689053543821.

128345350986 is a `hidden beast` number, since 1 + 2 + 8 + 3 + 4 + 53 + 509 + 86 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2184006 + ... + 2242001.

It is an arithmetic number, because the mean of its divisors is an integer number (7229884068).

Almost surely, 2^128345350986 is an apocalyptic number.

128345350986 is an abundant number, since it is smaller than the sum of its proper divisors (160850011734).

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

128345350986 is a wasteful number, since it uses less digits than its factorization.

128345350986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426200 (or 4426191 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 128345350986 in words is "one hundred twenty-eight billion, three hundred forty-five million, three hundred fifty thousand, nine hundred eighty-six".