420340144445 has 16 divisors (see below), whose sum is σ = 556457800752. Its totient is φ = 302834173440.

The previous prime is 420340144381. The next prime is 420340144453. The reversal of 420340144445 is 544441043024.

It can be written as a sum of positive squares in 8 ways, for example, as 28337682244 + 392002462201 = 168338^2 + 626101^2 .

It is not a de Polignac number, because 420340144445 - 2⁶ = 420340144381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78860402 + ... + 78865731.

It is an arithmetic number, because the mean of its divisors is an integer number (34778612547).

Almost surely, 2^420340144445 is an apocalyptic number.

It is an amenable number.

420340144445 is a deficient number, since it is larger than the sum of its proper divisors (136117656307).

420340144445 is a wasteful number, since it uses less digits than its factorization.

420340144445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157726192.

The product of its (nonzero) digits is 122880, while the sum is 35.

Adding to 420340144445 its reverse (544441043024), we get a palindrome (964781187469).

The spelling of 420340144445 in words is "four hundred twenty billion, three hundred forty million, one hundred forty-four thousand, four hundred forty-five".