29943796649 has 8 divisors (see below), whose sum is σ = 32330068680. Its totient is φ = 27569367936.

The previous prime is 29943796627. The next prime is 29943796661. The reversal of 29943796649 is 94669734992.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3374796649 + 26569000000 = 58093^2 + 163000^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29943796649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29943796249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2955572 + ... + 2965685.

It is an arithmetic number, because the mean of its divisors is an integer number (4041258585).

Almost surely, 2^29943796649 is an apocalyptic number.

It is an amenable number.

29943796649 is a deficient number, since it is larger than the sum of its proper divisors (2386272031).

29943796649 is a wasteful number, since it uses less digits than its factorization.

29943796649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921659.

The product of its digits is 158723712, while the sum is 68.

The spelling of 29943796649 in words is "twenty-nine billion, nine hundred forty-three million, seven hundred ninety-six thousand, six hundred forty-nine".