7217071065625 has 12 divisors (see below), whose sum is σ = 9020761470252. Its totient is φ = 5773656850000.

The previous prime is 7217071065563. The next prime is 7217071065641. The reversal of 7217071065625 is 5265601707127.

It can be written as a sum of positive squares in 6 ways, for example, as 4911134667664 + 2305936397961 = 2216108^2 + 1518531^2 .

It is not a de Polignac number, because 7217071065625 - 2²³ = 7217062677017 is a prime.

It is a super-2 number, since 2×7217071065625² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1154728246 + ... + 1154734495.

It is an arithmetic number, because the mean of its divisors is an integer number (751730122521).

Almost surely, 2^{7217071065625} is an apocalyptic number.

It is an amenable number.

7217071065625 is a deficient number, since it is larger than the sum of its proper divisors (1803690404627).

7217071065625 is an frugal number, since it uses more digits than its factorization.

7217071065625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309462766 (or 2309462746 counting only the distinct ones).

The product of its (nonzero) digits is 1234800, while the sum is 49.

The spelling of 7217071065625 in words is "seven trillion, two hundred seventeen billion, seventy-one million, sixty-five thousand, six hundred twenty-five".