29427161856 has 72 divisors (see below), whose sum is σ = 78655777200. Its totient is φ = 9766895616.

The previous prime is 29427161849. The next prime is 29427161887. The reversal of 29427161856 is 65816172492.

It is a junction number, because it is equal to n+sod(n) for n = 29427161799 and 29427161808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96720 + ... + 261168.

It is an arithmetic number, because the mean of its divisors is an integer number (1092441350).

Almost surely, 2^29427161856 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 29427161856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39327888600).

29427161856 is an abundant number, since it is smaller than the sum of its proper divisors (49228615344).

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

29427161856 is a wasteful number, since it uses less digits than its factorization.

29427161856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164701 (or 164687 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The spelling of 29427161856 in words is "twenty-nine billion, four hundred twenty-seven million, one hundred sixty-one thousand, eight hundred fifty-six".