29879729551 has 12 divisors (see below), whose sum is σ = 34782156048. Its totient is φ = 25593436512.

The previous prime is 29879729527. The next prime is 29879729597. The reversal of 29879729551 is 15592797892.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-29879729551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29879729501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139806 + ... + 281611.

It is an arithmetic number, because the mean of its divisors is an integer number (2898513004).

Almost surely, 2^29879729551 is an apocalyptic number.

29879729551 is a deficient number, since it is larger than the sum of its proper divisors (4902426497).

29879729551 is a wasteful number, since it uses less digits than its factorization.

29879729551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422878 (or 422871 counting only the distinct ones).

The product of its digits is 28576800, while the sum is 64.

The spelling of 29879729551 in words is "twenty-nine billion, eight hundred seventy-nine million, seven hundred twenty-nine thousand, five hundred fifty-one".