409278318128 has 60 divisors (see below), whose sum is σ = 886701554760. Its totient is φ = 182464598016.

The previous prime is 409278318083. The next prime is 409278318131. The reversal of 409278318128 is 821813872904.

It is a self number, because there is not a number n which added to its sum of digits gives 409278318128.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2241401 + ... + 2417112.

It is an arithmetic number, because the mean of its divisors is an integer number (14778359246).

Almost surely, 2^409278318128 is an apocalyptic number.

It is an amenable number.

409278318128 is an abundant number, since it is smaller than the sum of its proper divisors (477423236632).

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

409278318128 is a wasteful number, since it uses less digits than its factorization.

409278318128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4658574 (or 4658551 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 53.

The spelling of 409278318128 in words is "four hundred nine billion, two hundred seventy-eight million, three hundred eighteen thousand, one hundred twenty-eight".