29779874442 has 24 divisors (see below), whose sum is σ = 65161907460. Its totient is φ = 9828340800.

The previous prime is 29779874437. The next prime is 29779874471. The reversal of 29779874442 is 24447897792.

It can be written as a sum of positive squares in 2 ways, for example, as 23338367361 + 6441507081 = 152769^2 + 80259^2 .

It is a super-2 number, since 2×29779874442² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 29779874442.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 8188467 + ... + 8192102.

Almost surely, 2^29779874442 is an apocalyptic number.

29779874442 is an abundant number, since it is smaller than the sum of its proper divisors (35382033018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29779874442 is a wasteful number, since it uses less digits than its factorization.

29779874442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16380678 (or 16380675 counting only the distinct ones).

The product of its digits is 56899584, while the sum is 63.

The spelling of 29779874442 in words is "twenty-nine billion, seven hundred seventy-nine million, eight hundred seventy-four thousand, four hundred forty-two".