5447129688 has 768 divisors, whose sum is σ = 21373632000. Its totient is φ = 1262822400.

The previous prime is 5447129591. The next prime is 5447129693. The reversal of 5447129688 is 8869217445.

It is a happy number.

5447129688 is a `hidden beast` number, since 5 + 4 + 471 + 2 + 96 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 89297178 + ... + 89297238.

It is an arithmetic number, because the mean of its divisors is an integer number (27830250).

Almost surely, 2^5447129688 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 5447129688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10686816000).

5447129688 is an abundant number, since it is smaller than the sum of its proper divisors (15926502312).

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

5447129688 is a wasteful number, since it uses less digits than its factorization.

5447129688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 156 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 5447129688 is about 73804.6725350096. The cubic root of 5447129688 is about 1759.4998673623.

The spelling of 5447129688 in words is "five billion, four hundred forty-seven million, one hundred twenty-nine thousand, six hundred eighty-eight".