5640007257 has 12 divisors (see below), whose sum is σ = 8172380580. Its totient is φ = 3748141728.

The previous prime is 5640007223. The next prime is 5640007267. The reversal of 5640007257 is 7527000465.

5640007257 is a `hidden beast` number, since 5 + 640 + 0 + 0 + 7 + 2 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 329095881 + 5310911376 = 18141^2 + 72876^2 .

It is not a de Polignac number, because 5640007257 - 2¹⁰ = 5640006233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5640007207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 985582 + ... + 991287.

It is an arithmetic number, because the mean of its divisors is an integer number (681031715).

Almost surely, 2^5640007257 is an apocalyptic number.

It is an amenable number.

5640007257 is a deficient number, since it is larger than the sum of its proper divisors (2532373323).

5640007257 is a wasteful number, since it uses less digits than its factorization.

5640007257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977192 (or 1977189 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 5640007257 is about 75099.9817376809. The cubic root of 5640007257 is about 1780.0268540535.

The spelling of 5640007257 in words is "five billion, six hundred forty million, seven thousand, two hundred fifty-seven".