420005173855 has 8 divisors (see below), whose sum is σ = 504298735632. Its totient is φ = 335809121088.

The previous prime is 420005173843. The next prime is 420005173867. The reversal of 420005173855 is 558371500024.

It is an interprime number because it is at equal distance from previous prime (420005173843) and next prime (420005173867).

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 420005173855 - 2⁷ = 420005173727 is a prime.

It is a super-2 number, since 2×420005173855² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 24367774 + ... + 24385003.

It is an arithmetic number, because the mean of its divisors is an integer number (63037341954).

Almost surely, 2^420005173855 is an apocalyptic number.

420005173855 is a deficient number, since it is larger than the sum of its proper divisors (84293561777).

420005173855 is a wasteful number, since it uses less digits than its factorization.

420005173855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48754505.

The product of its (nonzero) digits is 168000, while the sum is 40.

Adding to 420005173855 its reverse (558371500024), we get a palindrome (978376673879).

The spelling of 420005173855 in words is "four hundred twenty billion, five million, one hundred seventy-three thousand, eight hundred fifty-five".