420796861656 has 72 divisors (see below), whose sum is σ = 1117657648620. Its totient is φ = 131997752832.

The previous prime is 420796861609. The next prime is 420796861663. The reversal of 420796861656 is 656168697024.

420796861656 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 420796861656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 54020610 + ... + 54028398.

Almost surely, 2^420796861656 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 420796861656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (558828824310).

420796861656 is an abundant number, since it is smaller than the sum of its proper divisors (696860786964).

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

420796861656 is an frugal number, since it uses more digits than its factorization.

420796861656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15621 (or 7811 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 60.

It can be divided in two parts, 4207968 and 61656, that added together give a palindrome (4269624).

The spelling of 420796861656 in words is "four hundred twenty billion, seven hundred ninety-six million, eight hundred sixty-one thousand, six hundred fifty-six".