29231779864 has 128 divisors (see below), whose sum is σ = 65669760000. Its totient is φ = 12189042432.

The previous prime is 29231779853. The next prime is 29231779867. The reversal of 29231779864 is 46897713292.

It is a junction number, because it is equal to n+sod(n) for n = 29231779799 and 29231779808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29231779867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16674412 + ... + 16676164.

It is an arithmetic number, because the mean of its divisors is an integer number (513045000).

Almost surely, 2^29231779864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29231779864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32834880000).

29231779864 is an abundant number, since it is smaller than the sum of its proper divisors (36437980136).

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

29231779864 is a wasteful number, since it uses less digits than its factorization.

29231779864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942 (or 1924 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 58.

The spelling of 29231779864 in words is "twenty-nine billion, two hundred thirty-one million, seven hundred seventy-nine thousand, eight hundred sixty-four".