421816118155 has 8 divisors (see below), whose sum is σ = 507776123952. Its totient is φ = 336388373088.

The previous prime is 421816118117. The next prime is 421816118209. The reversal of 421816118155 is 551811618124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421816118155 - 2⁷ = 421816118027 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 133063437 + ... + 133066606.

It is an arithmetic number, because the mean of its divisors is an integer number (63472015494).

Almost surely, 2^421816118155 is an apocalyptic number.

421816118155 is a deficient number, since it is larger than the sum of its proper divisors (85960005797).

421816118155 is a wasteful number, since it uses less digits than its factorization.

421816118155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266130365.

The product of its digits is 76800, while the sum is 43.

The spelling of 421816118155 in words is "four hundred twenty-one billion, eight hundred sixteen million, one hundred eighteen thousand, one hundred fifty-five".