5171771520 has 96 divisors (see below), whose sum is σ = 17858793420. Its totient is φ = 1379137536.

The previous prime is 5171771497. The next prime is 5171771531. The reversal of 5171771520 is 251771715.

5171771520 is a `hidden beast` number, since 51 + 7 + 17 + 71 + 520 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5111678016 + 60093504 = 71496^2 + 7752^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×5171771520² = 53494441310166220800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 443179 + ... + 454698.

Almost surely, 2^5171771520 is an apocalyptic number.

It is an amenable number.

5171771520 is an abundant number, since it is smaller than the sum of its proper divisors (12687021900).

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

5171771520 is a wasteful number, since it uses less digits than its factorization.

5171771520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897902 (or 897887 counting only the distinct ones).

The product of its (nonzero) digits is 17150, while the sum is 36.

The square root of 5171771520 is about 71915.0298616360. The cubic root of 5171771520 is about 1729.3375703444.

The spelling of 5171771520 in words is "five billion, one hundred seventy-one million, seven hundred seventy-one thousand, five hundred twenty".