420596735778 has 54 divisors (see below), whose sum is σ = 941828750811. Its totient is φ = 135648851400.

The previous prime is 420596735771. The next prime is 420596735813. The reversal of 420596735778 is 877537695024.

420596735778 is a `hidden beast` number, since 4 + 2 + 0 + 59 + 6 + 7 + 3 + 577 + 8 = 666.

420596735778 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 210298367889 + 210298367889 = 458583^2 + 458583^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=458583.

It is a super-2 number, since 2×420596735778² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420596735771) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 85293973 + ... + 85298903.

Almost surely, 2^420596735778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420596735778

420596735778 is an abundant number, since it is smaller than the sum of its proper divisors (521232015033).

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

420596735778 is an frugal number, since it uses more digits than its factorization.

420596735778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9932 (or 4967 counting only the distinct ones).

The product of its (nonzero) digits is 88905600, while the sum is 63.

The spelling of 420596735778 in words is "four hundred twenty billion, five hundred ninety-six million, seven hundred thirty-five thousand, seven hundred seventy-eight".