5147744857 has 4 divisors (see below), whose sum is σ = 5450553396. Its totient is φ = 4844936320.

The previous prime is 5147744807. The next prime is 5147744887. The reversal of 5147744857 is 7584477415.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1384658521 + 3763086336 = 37211^2 + 61344^2 .

It is a cyclic number.

It is not a de Polignac number, because 5147744857 - 2¹⁹ = 5147220569 is a prime.

It is a super-2 number, since 2×5147744857² = 52998554225539900898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5147744807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151404244 + ... + 151404277.

It is an arithmetic number, because the mean of its divisors is an integer number (1362638349).

Almost surely, 2^5147744857 is an apocalyptic number.

It is an amenable number.

5147744857 is a deficient number, since it is larger than the sum of its proper divisors (302808539).

5147744857 is a wasteful number, since it uses less digits than its factorization.

5147744857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302808538.

The product of its digits is 4390400, while the sum is 52.

The square root of 5147744857 is about 71747.7864257846. The cubic root of 5147744857 is about 1726.6553996961.

The spelling of 5147744857 in words is "five billion, one hundred forty-seven million, seven hundred forty-four thousand, eight hundred fifty-seven".