6984535939561 has 2 divisors, whose sum is σ = 6984535939562. Its totient is φ = 6984535939560.

The previous prime is 6984535939501. The next prime is 6984535939603. The reversal of 6984535939561 is 1659395354896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6639666330025 + 344869609536 = 2576755^2 + 587256^2 .

It is a cyclic number.

It is not a de Polignac number, because 6984535939561 - 2⁹ = 6984535939049 is a prime.

It is a super-2 number, since 2×6984535939561² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6984535939501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3492267969780 + 3492267969781.

It is an arithmetic number, because the mean of its divisors is an integer number (3492267969781).

Almost surely, 2^{6984535939561} is an apocalyptic number.

It is an amenable number.

6984535939561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6984535939561 is an equidigital number, since it uses as much as digits as its factorization.

6984535939561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 944784000, while the sum is 73.

The spelling of 6984535939561 in words is "six trillion, nine hundred eighty-four billion, five hundred thirty-five million, nine hundred thirty-nine thousand, five hundred sixty-one".