421776240516 has 72 divisors (see below), whose sum is σ = 1082899306944. Its totient is φ = 138396490560.

The previous prime is 421776240493. The next prime is 421776240527. The reversal of 421776240516 is 615042677124.

421776240516 is a `hidden beast` number, since 4 + 2 + 1 + 7 + 7 + 624 + 0 + 5 + 16 = 666.

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 23 ways as a sum of consecutive naturals, for example, 572881 + ... + 1082471.

It is an arithmetic number, because the mean of its divisors is an integer number (15040268152).

Almost surely, 2^421776240516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421776240516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (541449653472).

421776240516 is an abundant number, since it is smaller than the sum of its proper divisors (661123066428).

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

421776240516 is a wasteful number, since it uses less digits than its factorization.

421776240516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509961 (or 509956 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 421776240516 in words is "four hundred twenty-one billion, seven hundred seventy-six million, two hundred forty thousand, five hundred sixteen".