5245443657 has 16 divisors (see below), whose sum is σ = 7803552000. Its totient is φ = 3482326512.

The previous prime is 5245443647. The next prime is 5245443661. The reversal of 5245443657 is 7563445425.

5245443657 is a `hidden beast` number, since 5 + 24 + 544 + 36 + 57 = 666.

It is not a de Polignac number, because 5245443657 - 2⁷ = 5245443529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5245443617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399982 + ... + 412887.

It is an arithmetic number, because the mean of its divisors is an integer number (487722000).

Almost surely, 2^5245443657 is an apocalyptic number.

It is an amenable number.

5245443657 is a deficient number, since it is larger than the sum of its proper divisors (2558108343).

5245443657 is a wasteful number, since it uses less digits than its factorization.

5245443657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813117 (or 813111 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 45.

The square root of 5245443657 is about 72425.4351522999. The cubic root of 5245443657 is about 1737.5103842314.

The spelling of 5245443657 in words is "five billion, two hundred forty-five million, four hundred forty-three thousand, six hundred fifty-seven".