29991016378 has 16 divisors (see below), whose sum is σ = 47636709120. Its totient is φ = 14112258496.

The previous prime is 29991016369. The next prime is 29991016381. The reversal of 29991016378 is 87361019992.

It is a super-2 number, since 2×29991016378² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 496503 + ... + 553621.

It is an arithmetic number, because the mean of its divisors is an integer number (2977294320).

Almost surely, 2^29991016378 is an apocalyptic number.

29991016378 is a deficient number, since it is larger than the sum of its proper divisors (17645692742).

29991016378 is a wasteful number, since it uses less digits than its factorization.

29991016378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72581.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The spelling of 29991016378 in words is "twenty-nine billion, nine hundred ninety-one million, sixteen thousand, three hundred seventy-eight".