8438420454555 has 64 divisors (see below), whose sum is σ = 17491786583040. Its totient is φ = 3373415963136.

The previous prime is 8438420454467. The next prime is 8438420454589. The reversal of 8438420454555 is 5554540248348.

It is not a de Polignac number, because 8438420454555 - 2⁷ = 8438420454427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 8438420454495 and 8438420454504.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 162658092 + ... + 162709961.

It is an arithmetic number, because the mean of its divisors is an integer number (273309165360).

Almost surely, 2^{8438420454555} is an apocalyptic number.

8438420454555 is an abundant number, since it is smaller than the sum of its proper divisors (9053366128485).

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

8438420454555 is a wasteful number, since it uses less digits than its factorization.

8438420454555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325368100.

The product of its (nonzero) digits is 61440000, while the sum is 57.

The spelling of 8438420454555 in words is "eight trillion, four hundred thirty-eight billion, four hundred twenty million, four hundred fifty-four thousand, five hundred fifty-five".