8420435020601 has 4 divisors (see below), whose sum is σ = 8456574226932. Its totient is φ = 8384295814272.

The previous prime is 8420435020577. The next prime is 8420435020639. The reversal of 8420435020601 is 1060205340248.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 651533094976 + 7768901925625 = 807176^2 + 2787275^2 .

It is a cyclic number.

It is not a de Polignac number, because 8420435020601 - 2¹⁴ = 8420435004217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8420435020201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18069602816 + ... + 18069603281.

It is an arithmetic number, because the mean of its divisors is an integer number (2114143556733).

Almost surely, 2^{8420435020601} is an apocalyptic number.

It is an amenable number.

8420435020601 is a deficient number, since it is larger than the sum of its proper divisors (36139206331).

8420435020601 is a wasteful number, since it uses less digits than its factorization.

8420435020601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36139206330.

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 8420435020601 in words is "eight trillion, four hundred twenty billion, four hundred thirty-five million, twenty thousand, six hundred one".