5171681856 has 56 divisors (see below), whose sum is σ = 14927360544. Its totient is φ = 1567175680.

The previous prime is 5171681831. The next prime is 5171681863. The reversal of 5171681856 is 6581861715.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1222245 + ... + 1226468.

Almost surely, 2^5171681856 is an apocalyptic number.

It is an amenable number.

5171681856 is an abundant number, since it is smaller than the sum of its proper divisors (9755678688).

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

5171681856 is a wasteful number, since it uses less digits than its factorization.

5171681856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448739 (or 2448729 counting only the distinct ones).

The product of its digits is 403200, while the sum is 48.

The square root of 5171681856 is about 71914.4064565647. The cubic root of 5171681856 is about 1729.3275763336.

The spelling of 5171681856 in words is "five billion, one hundred seventy-one million, six hundred eighty-one thousand, eight hundred fifty-six".