7222071201640 has 64 divisors (see below), whose sum is σ = 16428186363600. Its totient is φ = 2857185681408.

The previous prime is 7222071201617. The next prime is 7222071201691. The reversal of 7222071201640 is 461021702227.

It can be written as a sum of positive squares in 8 ways, for example, as 4725589040964 + 2496482160676 = 2173842^2 + 1580026^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7222071201596 and 7222071201605.

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, 941592 + ... + 3915448.

Almost surely, 2^{7222071201640} is an apocalyptic number.

It is an amenable number.

7222071201640 is an abundant number, since it is smaller than the sum of its proper divisors (9206115161960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7222071201640 is a wasteful number, since it uses less digits than its factorization.

7222071201640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974534 (or 2974530 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

Adding to 7222071201640 its reverse (461021702227), we get a palindrome (7683092903867).

The spelling of 7222071201640 in words is "seven trillion, two hundred twenty-two billion, seventy-one million, two hundred one thousand, six hundred forty".