29168540891 has 64 divisors (see below), whose sum is σ = 37664870400. Its totient is φ = 22018811904.

The previous prime is 29168540873. The next prime is 29168540939. The reversal of 29168540891 is 19804586192.

It is a cyclic number.

It is not a de Polignac number, because 29168540891 - 2³⁰ = 28094799067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29168545891) 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 63 ways as a sum of consecutive naturals, for example, 12208325 + ... + 12210713.

It is an arithmetic number, because the mean of its divisors is an integer number (588513600).

Almost surely, 2^29168540891 is an apocalyptic number.

29168540891 is a deficient number, since it is larger than the sum of its proper divisors (8496329509).

29168540891 is a wasteful number, since it uses less digits than its factorization.

29168540891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2556.

The product of its (nonzero) digits is 1244160, while the sum is 53.

Adding to 29168540891 its sum of digits (53), we get a square (29168540944 = 170788²).

The spelling of 29168540891 in words is "twenty-nine billion, one hundred sixty-eight million, five hundred forty thousand, eight hundred ninety-one".