420642722624 has 14 divisors (see below), whose sum is σ = 834712902834. Its totient is φ = 210321361280.

The previous prime is 420642722603. The next prime is 420642722627. The reversal of 420642722624 is 426227246024.

It can be written as a sum of positive squares in only one way, i.e., 286833082624 + 133809640000 = 535568^2 + 365800^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420642722627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3286271207 + ... + 3286271334.

Almost surely, 2^420642722624 is an apocalyptic number.

It is an amenable number.

420642722624 is a deficient number, since it is larger than the sum of its proper divisors (414070180210).

420642722624 is an equidigital number, since it uses as much as digits as its factorization.

420642722624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6572542553 (or 6572542543 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 41.

Adding to 420642722624 its reverse (426227246024), we get a palindrome (846869968648).

The spelling of 420642722624 in words is "four hundred twenty billion, six hundred forty-two million, seven hundred twenty-two thousand, six hundred twenty-four".