29231017056 has 144 divisors (see below), whose sum is σ = 85999796064. Its totient is φ = 9410660352.

The previous prime is 29231017033. The next prime is 29231017069. The reversal of 29231017056 is 65071013292.

29231017056 is a `hidden beast` number, since 292 + 310 + 1 + 7 + 0 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 29231017056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1449861 + ... + 1469883.

It is an arithmetic number, because the mean of its divisors is an integer number (597220806).

Almost surely, 2^29231017056 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 29231017056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42999898032).

29231017056 is an abundant number, since it is smaller than the sum of its proper divisors (56768779008).

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

29231017056 is a wasteful number, since it uses less digits than its factorization.

29231017056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20213 (or 20202 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 29231017056 in words is "twenty-nine billion, two hundred thirty-one million, seventeen thousand, fifty-six".