6985557913 has 2 divisors, whose sum is σ = 6985557914. Its totient is φ = 6985557912.

The previous prime is 6985557899. The next prime is 6985557937. The reversal of 6985557913 is 3197555896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3512577289 + 3472980624 = 59267^2 + 58932^2 .

It is a cyclic number.

It is not a de Polignac number, because 6985557913 - 2¹³ = 6985549721 is a prime.

It is not a weakly prime, because it can be changed into another prime (6985557713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3492778956 + 3492778957.

It is an arithmetic number, because the mean of its divisors is an integer number (3492778957).

Almost surely, 2^6985557913 is an apocalyptic number.

It is an amenable number.

6985557913 is a deficient number, since it is larger than the sum of its proper divisors (1).

6985557913 is an equidigital number, since it uses as much as digits as its factorization.

6985557913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206000, while the sum is 58.

The square root of 6985557913 is about 83579.6501129312. The cubic root of 6985557913 is about 1911.6147189735.

The spelling of 6985557913 in words is "six billion, nine hundred eighty-five million, five hundred fifty-seven thousand, nine hundred thirteen".