29754978649 has 32 divisors (see below), whose sum is σ = 33209274240. Its totient is φ = 26435136000.

The previous prime is 29754978641. The next prime is 29754978661. The reversal of 29754978649 is 94687945792.

It is a cyclic number.

It is not a de Polignac number, because 29754978649 - 2³ = 29754978641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29754978641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31221957 + ... + 31222909.

It is an arithmetic number, because the mean of its divisors is an integer number (1037789820).

Almost surely, 2^29754978649 is an apocalyptic number.

It is an amenable number.

29754978649 is a deficient number, since it is larger than the sum of its proper divisors (3454295591).

29754978649 is a wasteful number, since it uses less digits than its factorization.

29754978649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401.

The product of its digits is 274337280, while the sum is 70.

The spelling of 29754978649 in words is "twenty-nine billion, seven hundred fifty-four million, nine hundred seventy-eight thousand, six hundred forty-nine".