7097643375721 has 8 divisors (see below), whose sum is σ = 7201591009704. Its totient is φ = 6994323824640.

The previous prime is 7097643375707. The next prime is 7097643375803. The reversal of 7097643375721 is 1275733467907.

It can be written as a sum of positive squares in 4 ways, for example, as 425444412121 + 6672198963600 = 652261^2 + 2583060^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7097643375721 - 2¹¹ = 7097643373673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7097643375721.

It is not an unprimeable number, because it can be changed into a prime (7097643370721) 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 7 ways as a sum of consecutive naturals, for example, 156997960 + ... + 157043161.

It is an arithmetic number, because the mean of its divisors is an integer number (900198876213).

Almost surely, 2^{7097643375721} is an apocalyptic number.

It is an amenable number.

7097643375721 is a deficient number, since it is larger than the sum of its proper divisors (103947633983).

7097643375721 is a wasteful number, since it uses less digits than its factorization.

7097643375721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314041451.

The product of its (nonzero) digits is 46675440, while the sum is 61.

The spelling of 7097643375721 in words is "seven trillion, ninety-seven billion, six hundred forty-three million, three hundred seventy-five thousand, seven hundred twenty-one".