420618748045 has 4 divisors (see below), whose sum is σ = 504742497660. Its totient is φ = 336494998432.

The previous prime is 420618747949. The next prime is 420618748097. The reversal of 420618748045 is 540847816024.

It is a happy number.

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 248384617924 + 172234130121 = 498382^2 + 415011^2 .

It is a cyclic number.

It is not a de Polignac number, because 420618748045 - 2²¹ = 420616650893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420618748045.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42061874800 + ... + 42061874809.

It is an arithmetic number, because the mean of its divisors is an integer number (126185624415).

Almost surely, 2^420618748045 is an apocalyptic number.

It is an amenable number.

420618748045 is a deficient number, since it is larger than the sum of its proper divisors (84123749615).

420618748045 is an equidigital number, since it uses as much as digits as its factorization.

420618748045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84123749614.

The product of its (nonzero) digits is 1720320, while the sum is 49.

The spelling of 420618748045 in words is "four hundred twenty billion, six hundred eighteen million, seven hundred forty-eight thousand, forty-five".