7036981791989 has 2 divisors, whose sum is σ = 7036981791990. Its totient is φ = 7036981791988.

The previous prime is 7036981791943. The next prime is 7036981791991. The reversal of 7036981791989 is 9891971896307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4080501000625 + 2956480791364 = 2020025^2 + 1719442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7036981791989 is a prime.

It is a super-2 number, since 2×7036981791989² (a number of 26 digits) contains 22 as substring.

Together with 7036981791991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7036981794989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3518490895994 + 3518490895995.

It is an arithmetic number, because the mean of its divisors is an integer number (3518490895995).

Almost surely, 2^{7036981791989} is an apocalyptic number.

It is an amenable number.

7036981791989 is a deficient number, since it is larger than the sum of its proper divisors (1).

7036981791989 is an equidigital number, since it uses as much as digits as its factorization.

7036981791989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 370355328, while the sum is 77.

The spelling of 7036981791989 in words is "seven trillion, thirty-six billion, nine hundred eighty-one million, seven hundred ninety-one thousand, nine hundred eighty-nine".