4215623645 has 4 divisors (see below), whose sum is σ = 5058748380. Its totient is φ = 3372498912.

The previous prime is 4215623641. The next prime is 4215623669. The reversal of 4215623645 is 5463265124.

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 2745131236 + 1470492409 = 52394^2 + 38347^2 .

It is a cyclic number.

It is not a de Polignac number, because 4215623645 - 2² = 4215623641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4215623599 and 4215623608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4215623641) 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, 421562360 + ... + 421562369.

It is an arithmetic number, because the mean of its divisors is an integer number (1264687095).

Almost surely, 2^4215623645 is an apocalyptic number.

It is an amenable number.

4215623645 is a deficient number, since it is larger than the sum of its proper divisors (843124735).

4215623645 is an equidigital number, since it uses as much as digits as its factorization.

4215623645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843124734.

The product of its digits is 172800, while the sum is 38.

The square root of 4215623645 is about 64927.8341314417. The cubic root of 4215623645 is about 1615.4267765067.

Adding to 4215623645 its reverse (5463265124), we get a palindrome (9678888769).

The spelling of 4215623645 in words is "four billion, two hundred fifteen million, six hundred twenty-three thousand, six hundred forty-five".