29171940688 has 40 divisors (see below), whose sum is σ = 62439396480. Its totient is φ = 13092119040.

The previous prime is 29171940617. The next prime is 29171940689. The reversal of 29171940688 is 88604917192.

It is a happy number.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29171940689) 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 7 ways as a sum of consecutive naturals, for example, 1035145 + ... + 1062952.

It is an arithmetic number, because the mean of its divisors is an integer number (1560984912).

Almost surely, 2^29171940688 is an apocalyptic number.

It is an amenable number.

29171940688 is an abundant number, since it is smaller than the sum of its proper divisors (33267455792).

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

29171940688 is a wasteful number, since it uses less digits than its factorization.

29171940688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098195 (or 2098189 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 29171940688 in words is "twenty-nine billion, one hundred seventy-one million, nine hundred forty thousand, six hundred eighty-eight".