7072975945729 has 4 divisors (see below), whose sum is σ = 7073251259476. Its totient is φ = 7072700631984.

The previous prime is 7072975945699. The next prime is 7072975945733. The reversal of 7072975945729 is 9275495792707.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6498522608400 + 574453337329 = 2549220^2 + 757927^2 .

It is a cyclic number.

It is not a de Polignac number, because 7072975945729 - 2¹³ = 7072975937537 is a prime.

It is a super-2 number, since 2×7072975945729² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7072975940729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137618334 + ... + 137669719.

It is an arithmetic number, because the mean of its divisors is an integer number (1768312814869).

Almost surely, 2^{7072975945729} is an apocalyptic number.

It is an amenable number.

7072975945729 is a deficient number, since it is larger than the sum of its proper divisors (275313747).

7072975945729 is a wasteful number, since it uses less digits than its factorization.

7072975945729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275313746.

The product of its (nonzero) digits is 700131600, while the sum is 73.

The spelling of 7072975945729 in words is "seven trillion, seventy-two billion, nine hundred seventy-five million, nine hundred forty-five thousand, seven hundred twenty-nine".