5171355648 has 84 divisors (see below), whose sum is σ = 14938773018. Its totient is φ = 1723760640.

The previous prime is 5171355643. The next prime is 5171355667. The reversal of 5171355648 is 8465531715.

5171355648 is a `hidden beast` number, since 51 + 7 + 1 + 3 + 556 + 48 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3990196224 + 1181159424 = 63168^2 + 34368^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (5171355643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38658 + ... + 108798.

Almost surely, 2^5171355648 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 5171355648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7469386509).

5171355648 is an abundant number, since it is smaller than the sum of its proper divisors (9767417370).

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

5171355648 is an equidigital number, since it uses as much as digits as its factorization.

5171355648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70173 (or 70146 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 5171355648 is about 71912.1383912341. The cubic root of 5171355648 is about 1729.2912159924.

The spelling of 5171355648 in words is "five billion, one hundred seventy-one million, three hundred fifty-five thousand, six hundred forty-eight".