5640122565 has 288 divisors, whose sum is σ = 13274876160. Its totient is φ = 2148249600.

The previous prime is 5640122561. The next prime is 5640122581. The reversal of 5640122565 is 5652210465.

5640122565 is a `hidden beast` number, since 5 + 640 + 1 + 2 + 2 + 5 + 6 + 5 = 666.

It is not a de Polignac number, because 5640122565 - 2² = 5640122561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640122561) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 137563945 + ... + 137563985.

It is an arithmetic number, because the mean of its divisors is an integer number (46093320).

Almost surely, 2^5640122565 is an apocalyptic number.

5640122565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5640122565 is an abundant number, since it is smaller than the sum of its proper divisors (7634753595).

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

5640122565 is a wasteful number, since it uses less digits than its factorization.

5640122565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 5640122565 is about 75100.7494303486. The cubic root of 5640122565 is about 1780.0389846488.

The spelling of 5640122565 in words is "five billion, six hundred forty million, one hundred twenty-two thousand, five hundred sixty-five".