7040294077721 has 2 divisors, whose sum is σ = 7040294077722. Its totient is φ = 7040294077720.

The previous prime is 7040294077711. The next prime is 7040294077723. The reversal of 7040294077721 is 1277704920407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5130745963225 + 1909548114496 = 2265115^2 + 1381864^2 .

It is an emirp because it is prime and its reverse (1277704920407) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7040294077721 is a prime.

Together with 7040294077723, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7040294077721.

It is not a weakly prime, because it can be changed into another prime (7040294077723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3520147038860 + 3520147038861.

It is an arithmetic number, because the mean of its divisors is an integer number (3520147038861).

Almost surely, 2^{7040294077721} is an apocalyptic number.

It is an amenable number.

7040294077721 is a deficient number, since it is larger than the sum of its proper divisors (1).

7040294077721 is an equidigital number, since it uses as much as digits as its factorization.

7040294077721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1382976, while the sum is 50.

The spelling of 7040294077721 in words is "seven trillion, forty billion, two hundred ninety-four million, seventy-seven thousand, seven hundred twenty-one".