4002221612545 has 8 divisors (see below), whose sum is σ = 5172101776296. Its totient is φ = 2955486729216.

The previous prime is 4002221612539. The next prime is 4002221612593. The reversal of 4002221612545 is 5452161222004.

It can be written as a sum of positive squares in 4 ways, for example, as 120659664321 + 3881561948224 = 347361^2 + 1970168^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4002221612545 - 2²³ = 4002213223937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4002221612545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30786320032 + ... + 30786320161.

It is an arithmetic number, because the mean of its divisors is an integer number (646512722037).

Almost surely, 2^{4002221612545} is an apocalyptic number.

It is an amenable number.

4002221612545 is a deficient number, since it is larger than the sum of its proper divisors (1169880163751).

4002221612545 is a wasteful number, since it uses less digits than its factorization.

4002221612545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61572640211.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 4002221612545 its reverse (5452161222004), we get a palindrome (9454382834549).

The spelling of 4002221612545 in words is "four trillion, two billion, two hundred twenty-one million, six hundred twelve thousand, five hundred forty-five".