7220916637 has 6 divisors (see below), whose sum is σ = 7937040734. Its totient is φ = 6564469560.

The previous prime is 7220916629. The next prime is 7220916643. The reversal of 7220916637 is 7366190227.

It can be written as a sum of positive squares in only one way, i.e., 5859749401 + 1361167236 = 76549^2 + 36894^2 .

It is not a de Polignac number, because 7220916637 - 2³ = 7220916629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7220916593 and 7220916602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220916667) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 29838378 + ... + 29838619.

Almost surely, 2^7220916637 is an apocalyptic number.

It is an amenable number.

7220916637 is a deficient number, since it is larger than the sum of its proper divisors (716124097).

7220916637 is a wasteful number, since it uses less digits than its factorization.

7220916637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59677019 (or 59677008 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 7220916637 is about 84975.9768228645. The cubic root of 7220916637 is about 1932.8468494521.

The spelling of 7220916637 in words is "seven billion, two hundred twenty million, nine hundred sixteen thousand, six hundred thirty-seven".