7372220644 has 6 divisors (see below), whose sum is σ = 12901386134. Its totient is φ = 3686110320.

The previous prime is 7372220641. The next prime is 7372220651. The reversal of 7372220644 is 4460222737.

It can be written as a sum of positive squares in only one way, i.e., 5824742400 + 1547478244 = 76320^2 + 39338^2 .

It is not an unprimeable number, because it can be changed into a prime (7372220641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 921527577 + ... + 921527584.

Almost surely, 2^7372220644 is an apocalyptic number.

It is an amenable number.

7372220644 is a deficient number, since it is larger than the sum of its proper divisors (5529165490).

7372220644 is a wasteful number, since it uses less digits than its factorization.

7372220644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843055165 (or 1843055163 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 37.

The square root of 7372220644 is about 85861.6366254452. The cubic root of 7372220644 is about 1946.2536569208.

The spelling of 7372220644 in words is "seven billion, three hundred seventy-two million, two hundred twenty thousand, six hundred forty-four".