421256605050 has 144 divisors (see below), whose sum is σ = 1169503227360. Its totient is φ = 108627765120.

The previous prime is 421256605027. The next prime is 421256605051. The reversal of 421256605050 is 50506652124.

421256605050 is a `hidden beast` number, since 4 + 21 + 25 + 6 + 605 + 0 + 5 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 421256604996 and 421256605014.

It is not an unprimeable number, because it can be changed into a prime (421256605051) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2636341 + ... + 2791559.

It is an arithmetic number, because the mean of its divisors is an integer number (8121550190).

Almost surely, 2^421256605050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421256605050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (584751613680).

421256605050 is an abundant number, since it is smaller than the sum of its proper divisors (748246622310).

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

421256605050 is a wasteful number, since it uses less digits than its factorization.

421256605050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155437 (or 155429 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 421256605050 in words is "four hundred twenty-one billion, two hundred fifty-six million, six hundred five thousand, fifty".