421546568861 has 24 divisors (see below), whose sum is σ = 489889071840. Its totient is φ = 361454654880.

The previous prime is 421546568831. The next prime is 421546568867. The reversal of 421546568861 is 168865645124.

It is not a de Polignac number, because 421546568861 - 2²² = 421542374557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421546568797 and 421546568806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421546568867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117995 + ... + 925751.

It is an arithmetic number, because the mean of its divisors is an integer number (20412044660).

Almost surely, 2^421546568861 is an apocalyptic number.

It is an amenable number.

421546568861 is a deficient number, since it is larger than the sum of its proper divisors (68342502979).

421546568861 is a wasteful number, since it uses less digits than its factorization.

421546568861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808025 (or 808014 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 56.

The spelling of 421546568861 in words is "four hundred twenty-one billion, five hundred forty-six million, five hundred sixty-eight thousand, eight hundred sixty-one".