5647491657 has 24 divisors (see below), whose sum is σ = 8643735360. Its totient is φ = 3543199200.

The previous prime is 5647491649. The next prime is 5647491667. The reversal of 5647491657 is 7561947465.

5647491657 is a `hidden beast` number, since 5 + 6 + 474 + 9 + 165 + 7 = 666.

It is not a de Polignac number, because 5647491657 - 2³ = 5647491649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5647491667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83538 + ... + 135179.

It is an arithmetic number, because the mean of its divisors is an integer number (360155640).

Almost surely, 2^5647491657 is an apocalyptic number.

5647491657 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

5647491657 is a deficient number, since it is larger than the sum of its proper divisors (2996243703).

5647491657 is a wasteful number, since it uses less digits than its factorization.

5647491657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218893 (or 218890 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The square root of 5647491657 is about 75149.7947901390. The cubic root of 5647491657 is about 1780.8138828448.

The spelling of 5647491657 in words is "five billion, six hundred forty-seven million, four hundred ninety-one thousand, six hundred fifty-seven".