29975643149 has 2 divisors, whose sum is σ = 29975643150. Its totient is φ = 29975643148.

The previous prime is 29975643121. The next prime is 29975643163. The reversal of 29975643149 is 94134657992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17410802500 + 12564840649 = 131950^2 + 112093^2 .

It is a cyclic number.

It is not a de Polignac number, because 29975643149 - 2²⁴ = 29958865933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29975643179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14987821574 + 14987821575.

It is an arithmetic number, because the mean of its divisors is an integer number (14987821575).

Almost surely, 2^29975643149 is an apocalyptic number.

It is an amenable number.

29975643149 is a deficient number, since it is larger than the sum of its proper divisors (1).

29975643149 is an equidigital number, since it uses as much as digits as its factorization.

29975643149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14696640, while the sum is 59.

The spelling of 29975643149 in words is "twenty-nine billion, nine hundred seventy-five million, six hundred forty-three thousand, one hundred forty-nine".