421853090850 has 168 divisors, whose sum is σ = 1179349994820. Its totient is φ = 112215144960.

The previous prime is 421853090837. The next prime is 421853090861. The reversal of 421853090850 is 58090358124.

421853090850 is a `hidden beast` number, since 4 + 21 + 8 + 530 + 90 + 8 + 5 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 154819427841 + 267033663009 = 393471^2 + 516753^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 421853090796 and 421853090805.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 14893902 + ... + 14922198.

Almost surely, 2^421853090850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421853090850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (589674997410).

421853090850 is an abundant number, since it is smaller than the sum of its proper divisors (757496903970).

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

421853090850 is a wasteful number, since it uses less digits than its factorization.

421853090850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28736 (or 28716 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 421853090850 in words is "four hundred twenty-one billion, eight hundred fifty-three million, ninety thousand, eight hundred fifty".