29161819493 has 16 divisors (see below), whose sum is σ = 29882012160. Its totient is φ = 28449985536.

The previous prime is 29161819469. The next prime is 29161819501. The reversal of 29161819493 is 39491816192.

It is a cyclic number.

It is not a de Polignac number, because 29161819493 - 2⁶ = 29161819429 is a prime.

It is a super-2 number, since 2×29161819493² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29161819433) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4430621 + ... + 4437197.

It is an arithmetic number, because the mean of its divisors is an integer number (1867625760).

Almost surely, 2^29161819493 is an apocalyptic number.

It is an amenable number.

29161819493 is a deficient number, since it is larger than the sum of its proper divisors (720192667).

29161819493 is a wasteful number, since it uses less digits than its factorization.

29161819493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7196.

The product of its digits is 839808, while the sum is 53.

The spelling of 29161819493 in words is "twenty-nine billion, one hundred sixty-one million, eight hundred nineteen thousand, four hundred ninety-three".