7220774616445 has 8 divisors (see below), whose sum is σ = 9331462581336. Its totient is φ = 5332264332096.

The previous prime is 7220774616439. The next prime is 7220774616449. The reversal of 7220774616445 is 5446164770227.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 92018795716 + 7128755820729 = 303346^2 + 2669973^2 .

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

It is not a de Polignac number, because 7220774616445 - 2⁹ = 7220774615933 is a prime.

It is a super-2 number, since 2×7220774616445² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220774616449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55544420062 + ... + 55544420191.

It is an arithmetic number, because the mean of its divisors is an integer number (1166432822667).

Almost surely, 2^{7220774616445} is an apocalyptic number.

It is an amenable number.

7220774616445 is a deficient number, since it is larger than the sum of its proper divisors (2110687964891).

7220774616445 is a wasteful number, since it uses less digits than its factorization.

7220774616445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111088840271.

The product of its (nonzero) digits is 15805440, while the sum is 55.

The spelling of 7220774616445 in words is "seven trillion, two hundred twenty billion, seven hundred seventy-four million, six hundred sixteen thousand, four hundred forty-five".