420886078817 has 4 divisors (see below), whose sum is σ = 421540645680. Its totient is φ = 420231511956.

The previous prime is 420886078793. The next prime is 420886078831. The reversal of 420886078817 is 718870688024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420886078817 - 2¹⁰ = 420886077793 is a prime.

It is a super-2 number, since 2×420886078817² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420886078867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327282467 + ... + 327283752.

It is an arithmetic number, because the mean of its divisors is an integer number (105385161420).

Almost surely, 2^420886078817 is an apocalyptic number.

It is an amenable number.

420886078817 is a deficient number, since it is larger than the sum of its proper divisors (654566863).

420886078817 is an equidigital number, since it uses as much as digits as its factorization.

420886078817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654566862.

The product of its (nonzero) digits is 9633792, while the sum is 59.

The spelling of 420886078817 in words is "four hundred twenty billion, eight hundred eighty-six million, seventy-eight thousand, eight hundred seventeen".