5640155668 has 12 divisors (see below), whose sum is σ = 11280311392. Its totient is φ = 2417209560.

The previous prime is 5640155663. The next prime is 5640155687. The reversal of 5640155668 is 8665510465.

5640155668 is an admirable number.

It is a super-2 number, since 2×5640155668² = 63622711918545052448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640155663) 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, 100717038 + ... + 100717093.

Almost surely, 2^5640155668 is an apocalyptic number.

It is an amenable number.

5640155668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

5640155668 is a wasteful number, since it uses less digits than its factorization.

5640155668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201434142 (or 201434140 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 46.

The square root of 5640155668 is about 75100.9698206355. The cubic root of 5640155668 is about 1780.0424671095.

The spelling of 5640155668 in words is "five billion, six hundred forty million, one hundred fifty-five thousand, six hundred sixty-eight".